Geoengineering proof from NOAA?

NOAA, July 2011, stated that aerosols in the stratosphere are offsetting climate change.

NOAA study: Increase in particles high in Earth’s atmosphere has offset some recent climate warming

A recent increase in the abundance of particles high in the atmosphere has offset about a third of the current climate warming influence of carbon dioxide (CO2) change during the past decade, according to a new study led by NOAA and published today in the online edition of Science.

In the stratosphere, miles above Earth’s surface, small, airborne particles reflect sunlight back into space, which leads to a cooling influence at the ground. These particles are also called “aerosols," and the new paper explores their recent climate effects -- the reasons behind their increase remain the subject of ongoing research.

“Since the year 2000, stratospheric aerosols have caused a slower rate of climate warming than we would have seen without them,” says John Daniel, a physicist at the NOAA Earth System Research Laboratory (ESRL) in Boulder, Colo. and an author of the new study.

In fact they say that the change is rapid and doubled in the decade:

“Stratospheric aerosol increased surprisingly rapidly in that time, almost doubling during the decade,” Daniel said.

They then admit they don't know the source of these aerosols but give this speculation:

The reasons for the 10-year increase in stratospheric aerosols are not fully understood and are the subject of ongoing research... Likely suspects are natural sources – smaller volcanic eruptions – and/or human activities, which could have emitted the sulfur-containing gases, such as sulfur dioxide

I think there is a much more logical explanation. One the geoengineers give as there number one and cheapest solution: link. Start the video at minute 4:02 for explanation.


Introducing aerosols into the upper atmospher is call SRM for Solar Radiation Management. Here is the Huges patent describing how it is done: link

SUMMARY OF THE INVENTION

A method is disclosed for reducing atmospheric warming due to the greenhouse effect resulting from a greenhouse gases layer. The method comprises the step of seeding the greenhouse gas layer with a quantity of tiny particles of materials ... Such materials can include the class of materials known as Welsbach materials. The oxides of metal, e.g., aluminum oxide, are also suitable for the purpose.

One technique proposed to seed the metallic particles was to add the tiny particles to the fuel of jet airliners, so that the particles would be emitted from the jet engine exhaust while the airliner was at its cruising altitude.

Here is an extensive report on how to do it and how much it would cost: Aurora Report

So NOAA is showing these aerosols are mysteriously appearing in the upper atmospher, admit they don't know why... yet there is lots of active political action to spread these same aerosols..... hmmmm....

So if it's in the air, are we seeing it fall to the ground? I mean if they are spraying aluminum we would see it affecting plants and animals right?

Extremely high quantities of aluminum, barium, strontium, and other metals and chemicals are showing up in rainwater, surface water and air. In just the last four years, citizens in the Pacific Northwest (Northern CA, Oregon) have taken dozens of tests where the levels of aluminum, for example, has escalated hundreds of times from the first tests, which were already unusually high. Some tests of single rain events had elevated nearly 50,000% from the original 7ppb. These tests correspond with the state of California’s own test results…

This data matches data from other citizen and environmental groups testing nationwide as well as Europe. Dangerous levels of aluminum, barium and other contaminants have saturated most surface waters in much of the US and all NATO countries. The metals found exactly match the primary elements listed in a host of “geo-engineering patents”
Patents (assigned to Hughes Aircraft, DOD, Raytheon, and others) describe the specific goal of creating artificial cloud cover (reflecting, therefore cooling), and other forms of weather/ climate modification.

The California Air Quality Resources Board has studied aerosols migrating from China and these rainwater and air metals (matching the patents) are not present in rain or air approaching our continent. The contamination begins on-shore, though clearly just off-shore as well.

Recent soil testing and analysis reveals that soil PH’s are now changing tremendously. A number of studies state conclusively that bio-available aluminum is highly detrimental to countless organisms, including conifers.. Sierra Nevada firs have died or begun dying by the stands, even in riparian areas where they never lack water. In the same four years (California), alarming declines in amphibians have also been observed. Aluminum drives PH towards base (alkaline), also severely affecting the forests.

link

Maybe we are finding the reasons for all the mass die offs...Birds, snakes, bats, bees, all sorts of aquatic wildlife are being affected. There was a recent report in England about how the snakes are in rapid decline and there is an unpublished report they are working on in the US that shows the same thing. The females are dieing faster than the males and one theory is because they store fat for breeding which is being loaded with toxic chemicals.

Could snakes worldwide be going the same way as frogs and fish? A study of 11 snake species in locations across the UK, France, Italy, Nigeria, and Australia suggests that snake populations may be suffering a widespread decline.

link

Long-term studies have previously revealed population declines in fish, amphibians, reptiles, birds and mammals. Many of these declines are a global phenomenon whose causes may vary but are often unclear.

link

It is not proof positive, but a good circumstantial case. We are getting closer to clear evidence someone has begun geoengineering. Our government has a long history of lieing first, admitting later. Look at MK ULTRA, radiation experiments, and many many more: ATS official thread link

They called Elmer Allen crazy because he was telling the world he was a human ginny pig for radiation experiments... they only admitted it after he was dead and gave the family money for damages. doe.gov

If they are willing to murder while experimenting, what wouldn't they lie and do?

reply to post by pianopraze


Excellent find, my friend!

How can you even argue with this information? They're basicly flat out admitting it.
I have to run for now, but I'll certainly check out the videos later.

Originally posted by Afterthought
reply to post by pianopraze

 

Excellent find, my friend!

How can you even argue with this information? They're basicly flat out admitting it.
I have to run for now, but I'll certainly check out the videos later.

They couldn't come much closer without out right admitting it.

Makes you wonder if this is either:

1.) crosstalk in the scientific community showing the results of ongoing geoengineering.

2.)pressure from whistle-blowing scientists who can't out right admit it for fear of loosing jobs.

Here is a Congressional pannel on geoengineering with several papers suggesting SRM:house.gov

here are the scientists papers from that link:
paper 1
paper 2
paper 3
paper 4

That last paper is by David Keith.

You might remember him from BurnTheShips recent thread.

Keith is now Bill Gate's lap dog, pushing for geoengineering so Bill Gates can make more Billions. He strikes me as a psychopath, here is an interview which shows him in action, see if you agree:

reply to post by pianopraze


Piano,

Great information, thank you!

What "conincidental" timing is it not that the NOAA has now put forth that aerosols
have cooled the planet, and with their "science" about 1/3 of the "problem" of
"Anthropogenic Global Warming" is covered...lets take a guess what comes next?

From the OP video, a screen shot at about 4:30 which depicts planes
spraying sulfate aerosols into the air. I find the image disturbing, and it
actually depicts the favored method of aerosol delivery.


www.youtube.com...

Which is ironic, since The Royal Society, which is heavily involved in the
international geoengineering conversation and directives is on record

But the option that is taken most seriously is altogether grander in conception and scale. The scheme proposes nothing less than the transformation of the chemical composition of the Earth's atmosphere so that humans can regulate the temperature of the planet as desired. Like volcanic eruptions, it involves injecting sulphur dioxide gas into the stratosphere to blanket the Earth with tiny particles that reflect solar radiation.

Various schemes have been proposed, with the most promising being adaptation of high-flying aircraft fitted with extra tanks and nozzles to spray the chemicals. A fleet of 747s could do the job. www.guardian.co.uk...

And while the NOAA may be familiar with particulate matter spewed from volcanos,
and seawater ...they may have learned that nanoparticles that have been developed
for Solar Radiation Management have unintended consequences.

Here is the information on photophoretic levitation ....of nanoparticles.

engineered nanoparticles could exploit photophoretic forces, enabling more control over particle distribution and lifetime than is possible with sulfates, perhaps allowing climate engineering to be accomplished with fewer side effects. The use of electrostatic or magnetic materials enables a class of photophoretic forces not found in nature. Photophoretic levitation could loft particles above the stratosphere, reducing their capacity to interfere with ozone chemistry; and, by increasing particle lifetimes, it would reduce the need for continual replenishment of the aerosol.www.pnas.org...

While the NOAA has not admitted an ongoing operation, there are
experiments that have taken place and here are the links...
ams.confex.com...

92nd American Meteorological Society Annual Meeting (January 22-26, 2012): Aerosol,
Precipitation, and Cloud Properties—

E-PEACE (Eastern Pacific Emitted Aerosol-Cloud Experiment 2011).
... a technique for dispensing GCCN (milled salt particles) in marine stratocumulus clouds and then measuring the response of the cloud to the seeding was developed and tested.

The Twin Otter was equipped with an extensive suite of instrumentation for characterizing clouds and aerosols and measuring meteorology parameters and turbulence. A 95 GHz Doppler cloud radar was operated in an upward facing configuration to measure cloud and precipitation structures observed above the aircraft and served as an effective tool for detecting a broadening of the cloud droplet spectrum and drizzle production due to seeding. The salt powder consists of salt milled to 3-5 micron particles that are coated to minimize clumping. The particles were dispensed from the Twin Otter using an apparatus that uses a variable-speed auger feed to deliver salt from a reservoir into a fluidized bed of sand (to breakup any particle clusters) and then blow the particles into the airstream from a tube extending from the underside of the aircraft fuselage. ams.confex.com...

The Eastern-Pacific Emitted Aerosol Cloud Experiment (E-PEACE) uses satellite and in situ ship- and airplane-based measurements of anthropogenic aerosol in stratocumulus off the coast of Monterey, Calif., to shed light on cloud-property modification by aerosol. One novel aspect of the experiment is the controlled release of aerosol particles. These order 100 nm-diameter particles are produced on board a ship at a rate of 10^15 s^-1 and greater along pre-selected ship tracks to raise aerosol concentration above marine background levels over areas of hundreds of km^2 in area. Production of the aerosol patterns is timed to permit study by instrumented aircraft and the morning and afternoon Earth Observing System (EOS) satellite constellations. We describe the particle release patterns employed in the E-PEACE 2011 campaign and the cloud structures into which the particles were released, and we present results from the study of these tracks and other ship tracks using EOS satellite cloud and aerosol observations. ams.confex.com...

While that one took place in Montery, who knows what they are doing in other places?

Finally someone did his homework and precented some fact's.

It's not proof yet, but it's a step closer.

I am not in doubt that we all know that mankind is affeecting the planet with allmost all it's actions in the daily live and rutine of making society running.
The victims are the animals, and in the end human mankind.

How bad it is or how big the damage is, are still relativly unknown, and that might be the problem.
If we don't see the damage right away, we will not be concerned about it, but for the future generation it could be devastating.
No matter if this is done deliberatly or is a sideeffect of above, we need to be more aware of our actions...All of us.

I will still be a little skeptic about geoengineering being done on purpose, but S+F for some facts.

reply to post by pianopraze

This dosent have to do anything with chemtrails. It could very well be the higher cosmic ray levels thanks to low solar activity, which is something we global warming skeptics has been predicting for quite some time, which is one of the reasons why co2 does not matter much at all.

There are also plenty of other sources, so don't see how this is proof of anything.

Originally posted by burntheships
reply to post by pianopraze

 

Piano,

From that video, a screen shot at about 4:30 into the video which depicts planes
spraying sulfate aerosols into the air. I find the image disturbing, and it actually
depicts the favored method of aerosol delivery.


www.youtube.com...

And while the NOAA may be familiar with particulate matter spewed from volcanos,
and seawater ...they may have learned that nanoparticles that have been developed
for Solar Radiation Management have unintended consequences.

Here is the information on photophoretic levitation ....of nanoparticles.

engineered nanoparticles could exploit photophoretic forces, enabling more control over particle distribution and lifetime than is possible with sulfates, perhaps allowing climate engineering to be accomplished with fewer side effects. The use of electrostatic or magnetic materials enables a class of photophoretic forces not found in nature. Photophoretic levitation could loft particles above the stratosphere, reducing their capacity to interfere with ozone chemistry; and, by increasing particle lifetimes, it would reduce the need for continual replenishment of the aerosol.www.pnas.org...

Very interesting.

Here was a Bay Area Science Festival hosted by Berkley on the topic. Chapter 8 is on Solar Radiation Management... which is why they would introduce these Aerosols. link

Here's 5 minutes... there is 1:37 minutes more on the link above. This video talks about SRM through aerosols:


Here is a whole initiative which sprung up after the Royal Society looked at geoengineering.. This society wants to do SRM: link

About SRMGI
The Solar Radiation Management Research Governance Initiative (SRMGI) was launched in March 2010 in response to the 2009 Royal Society report Geoengineering the climate.

The report concluded that geoengineering is not an alternative to reducing greenhouse has emissions. However, it may be the only option to reduce temperatures quickly in the event of a climate emergency.

The convening partners of the SRMGI are the Royal Society, the Academy of Sciences for the Developing World (TWAS) and Environmental Defense Fund (EDF).

Mission

The SRMGI seeks to develop guidelines to ensure that geoengineering research is conducted in a manner that is transparent, responsible and environmentally sound.

SRMGI will engage with a variety of organizations concerned with natural and social science, governance and legal issues, as well as environmental and development NGOs, industry and civil society organizations, from across the globe.

The diversity of partner organizations reflects the wide range of viewpoints on geoengineering, and recognizes that any governance arrangements for research will have to enjoy broad legitimacy and support.

Solar Radiation Management was one of the main suggestions of teh CFR when they looked at geoengineering.
Geoengineering: Workshop on Unilateral Planetary Scale Geoengineering

Stratospheric aerosols
Adding more of the right kind of fine particles to the stratosphere can increase the amount of sunlight that is reflected back into space.

And I think most of ats is aware that when the CFR tells Washington to jump, they ask: how high?

"I won't have as far to go to be told what we should be doing, and how we should think about the future"
-Hillary Clinton at the CFR

Originally posted by juleol
reply to post by pianopraze

 

This dosent have to do anything with chemtrails. It could very well be the higher cosmic ray levels thanks to low solar activity, which is something we global warming skeptics has been predicting for quite some time, which is one of the reasons why co2 does not matter much at all.

There are also plenty of other sources, so don't see how this is proof of anything.

edit on 12-3-2012 by juleol because: (no reason given)

Did I ever once mention chemtrails?

This is circumstantial evidence of geoengineering through Solar Radiation Management via the injection of aerosol particulates into the stratosphere.

Now why don't you read what I wrote, not what you have in your head.

reply to post by pianopraze

NOAA, July 2011, stated that aerosols in the stratosphere are offsetting climate change.

hmmm, looks like they've stumbled upon a umm, source of additional and unpredicted concentrated particulate emission

also it seems there's a move back to global cooling which i remember reading about in the 70's


funny how Mckennas predictions re the speeding up
of events/novelty have seemingly shifted into high gear this year

before the usual suspects arrive and noting
a lot of new members on your last thread, and for their benefit i'll start off with an expose on

chemtrail debunkers methods and tactics:
Debunking Chemtrail Debunkers - The Government's Quisling Shills

They try to "counsel" people against using the guidance of their eyes and their common sense in chemtrails; they, instead, apparently, want them to blindly obey "the official story".

Orgone tech for dispersing chemtrails or whatever is being... added to the athmosphere
Goodbye Chemtrails, Hello Blue Skies! The Do-It-Yourself Kit for Sky Repair

reply to post by pianopraze


Piano,

David Keith is Dr. Stranglove...and the methods of geoengineering proposed by him
and his cohorts are questionable, in effectivness and safety!

Keith has been tasked with Public Acceptance, by his own admission.
The community has worked hard at painting him as a freindly scientist
aligned with the good guys.

However, Keith's own papers have tied him to the effectivness of Sulfate aerosols, and
worse, nano aluminum particles with Barium! Favored method of delivery again,
by aircraft!

Keith's own studies suggest that if we were ever forced to try to screen out some of the sun's rays globally, it would be more effective to spray sulphuric acid from aircraft (Geophysical Research Letters, DOI: 10.1029/2010GL043975).

It would also be cheaper, costing a few billion dollars a year according to a study by Aurora Flight Sciences
www.pnas.org...

Proposed self-aligning, levitating, sunlight-reflecting nano-disc (Keith, 2010)
In a nutshell, David’s idea is to engineer discs around 10 micrometers across and 50 nanometers thick, with a core of aluminum, a top layer of aluminum oxide, and a bottom layer of barium titanate. Injected high enough into the atmosphere

2020science.org...

"Atmospheric Dusting"

Here I examine the possibility that engineered nanoparticles could exploit photophoretic forces, enabling more control over particle distribution and lifetime than is possible with sulfates, perhaps allowing climate engineering to be accomplished with fewer side effects. The use of electrostatic or magnetic materials enables a class of photophoretic forces not found in nature. Photophoretic levitation could loft particles above the stratosphere, reducing their capacity to interfere with ozone chemistry; and, by increasing particle lifetimes, it would reduce the need for continual replenishment of the aerosol. Moreover, particles might be engineered to drift poleward enabling albedo modification to be tailored to counter polar warming while minimizing the impact on equatorial climates.

www.pnas.org...

Its the same dangerous proposals coming from all of these Geoengineering proponents!

We hear the same mantra day after day...“…Geoengineering is not a solution to climate change and global warming…”

They are instead enlisting support to spend enormous sums to buy time to do something later,
in case of an "emergency'.

What research, project funding, and development are they now engaging in to fix our
current pollution problems now? None, no they spend billions of dollars every year,
Society,
Governments

reply to post by DerepentLEstranger


Derp, always enjoying your posts!

They are basically caught in the act here...well at least to this end.
Thought you and Piano would like this little tidbit!

Professor Benford (U.C. Irvine, CA), wrote the following regarding the public
in a Reason.com article in 1997:

“…But perhaps the greatest unknown is social: How will the politically aware public react--those who vote, anyway?

If geoengineers are painted early and often as Dr. Strangeloves of the air, they will fail.

Properly portrayed as allies of science--and true environmentalism--they could become heroes…

A major factor here will be whether mitigation looks like yet another top-down contrivance,
another set of orders from the elite.

source credit

The problem with this theory is:

1) The exact same increase in the (highly variable) background levels happened in the 1970s and 1980s
2) The level of SSA dipped in 1990s, corresponding with effects of the clean air acts
3) The level rose in the 2000s, corresponding with a massive increase in Chinese coal burning, accounting for 77% of the SSA increase.

www.bbc.co.uk...

China's coal use doubled 2002-2007, according to US government figures.

Although burning the coal produced more warming carbon dioxide, it also put more tiny sulphate aerosol particles into the atmosphere which cool the planet by reflecting solar energy back into space.

www.skepticalscience.com...

To identify what may have led to this slow-down, Kaufmann (2011) use a statistical model to compare natural and human-caused forcings. They find that the increase in greenhouse gases was exceeded by an even greater increase in sunlight-reflecting sulfate aerosols, which originate from the rapid industrialization of China. Chinese coal-burning in particular doubled in the 4 years from 2003-2007, and makes up some 77% of the 26% global increase over that time.

Originally posted by juleol
This dosent have to do anything with chemtrails.

Where does the OP say it has anything to do with chemtrails? WHY do you debunkers keep trying to put words in his mouth?

:shk:

Originally posted by Mianeye
Finally someone did his homework and precented some fact's.

Where have you been, on vacation? BST and Piano have many threads presenting solid evidence

Awesome thread! Every Geo-engineering thread has three people that always come by and say the same things no matter what, I see you've got one here so far. S+F

Unilateral Geoengineering Non-technical Briefing
Notes for a Workshop At the Council on Foreign Relations
Washington DC, May 05, 2008

Summary
There are a variety of strategies, such as injecting light-reflecting particles into the
stratosphere, that might be used to modify the Earth’s atmosphere-ocean system in an
attempt to slow or reverse global warming. All of these "geoengineering" strategies
involve great uncertainty and carry significant risks. They may not work as expected,
imposing large unintended consequences on the climate system. While offsetting
warming, most strategies are likely to leave other impacts unchecked, such as
acidification of the ocean, the destruction of coral reefs, and changes in composition of
terrestrial ecosystems. Yet, despite uncertain and very negative potential consequences,
geoengineering might be needed to avert or reverse some dramatic change in the climate
system, such as several meters of sea level rise that could impose disaster on hundreds of
millions of people.

Unlike the control of greenhouse gas emissions, which must be undertaken by all major
emitting nations to be effective and is likely to be costly, geoengineering could be
undertaken quickly and unilaterally by a single party, at relatively low cost. Unilateral
geoengineering, however, is highly likely to impose costs on other countries and run risks
with the entire planet’s climate system.

This workshop will focus on the question of strategies for constraining and shaping
geoengineering. We will explore formal, legal strategies as well as informal efforts to
create norms that could govern testing and deployment of geoengineering systems and
their possible undesirable consequences. We will probe whether it is possible to limit the
use of geoengineering to circumstances of collective action by the international
community in the face of true global emergencies and what might happen when there are
disputes over when the emergency “trigger” should be pulled.

www.cfr.org...

Other papers cited:

P. Crutzen, “Albedo Enhancement By Stratospheric Sulfur Injections: A Contribution To Resolve A
Policy Dilemma?” Climatic Change, 77, 211–219, 2006.

D. Keith, "Photophoretic levitation of aerosols for geoengineering," Geophysical Research Abstracts, 10,
EGU2008-A-11400, 2008

S. Salter, “Sea-Going Hardware for the Implementation of the Cloud Albedo Control Method for the
reduction of Global Warming,” preprint submitted to EIC 2006 Climate Change Conference, Ottowa, CA,
May 2006

There are many more

My favorite is this one...

R. Angel, “Feasibility of cooling the Earth with a cloud of small spacecraft near the inner Lagrange point
(L1),” PNAS, 103, 17184-17189, 2006.

Originally posted by Uncinus
The problem with this theory is:

1) The exact same increase in the (highly variable) background levels happened in the 1970s and 1980s
2) The level of SSA dipped in 1990s, corresponding with effects of the clean air acts
3) The level rose in the 2000s, corresponding with a massive increase in Chinese coal burning, accounting for 77% of the SSA increase.

How about the testimony of two pilots who are piloting these flights?

Qutch, I am not asking you to convince everyone all I am asking is some proof that GeoEngineering/ SRM flight are happening. You claim it is everyday of the week but can give no proof no photos of planes getting loaded, no increase in sulfur or other minerals that people want to use for GeoEngineering. I am not saying zero flights are taking place in fact in my post I said I know there are one off test flight happening.

Well, here it is. . I have absolute proof Gonzo . . Doug Taylor himself is flying them. . There is no more credible sauce source of information on JC than Doug Taylor.

Doug Taylor said: ↑
I have been sent on Chem Trail missions over the North Atlantic in advance of the G7 meetings.

Drip...

Drip...

Drip...

reply to post by zorgon
Ok..i admit, i didn't read them all, a lot of threads get lost in the jungle in here.

Maybe i shouldn't have put "finally" in my post....My bad
What i meant was, not just a video of contrails claimed to be chemtrails, but some actual facts with links, about the big picture.

reply to post by pianopraze


Oh, you posted that!

I like how they talk about Pilot Quals for the Solar Radiation Management Flights.

reply to post by zorgon


One for you Zorgon....wondering how much cooling has been delivered by
these babies.

4.3.3. Model Results for Supersonic Aircraft Emissions
4.3.3.1. NOy and H2O Enhancement

Figure 4-7: Northern Hemisphere total O3 column change as a function of EI(NOx) in 2015 for an HSCT fleet size of 500 active aircraft with (a) SA0 sulfate distribution and (b) 4xSA0 sulfate distribution with no sulfur aircraft emissions.

Supersonic aircraft emissions of NOx and H2O were incorporated within six 2-D models and three 3-D models. These supersonic aircraft emissions are primarily deposited within the Northern Hemisphere LS. Figure 4-6 shows calculated perturbations in NOy and H2O from HSCT emissions in June 2015

www.ipcc.ch...

reply to post by pianopraze


Sorry, dude...again, no "proof" as suggested (but, you did use a '?' in the title).


Problem is the "sources"....after the NOAA (valid) then there is a link down in the OP to a website called "wiserearth".

And, that is spewing the same tired and false claims of "higher levels of this and that", just as every so-called "sky watch"-type website has been doing for some time, now.

Furthermore, at "wiserearth", the mention of Rosalind Peterson. She has been debunked countless times in many ATS threads.

Given that, the OP is a clutch of facts and misinformation, rolled into one. It is also a bit of a 'blitzkrieg" of info, making it more time-consuming to address each and every aspect where sources are known to be questionable.


So, the focus should have been on the NOAA, as that is in the title. And, the graphic posted above the "wiserearth" web link is also worthy of attention. Note the huge amounts of ground-based pollution and aerosol sources that are shown.

The study found that it doesn't take large volcanoes to have a significant effect on stratospheric aerosols. Small eruptions make a significant contribution. The spikes seen in the data correspond eruptions of smaller volcanos.

From the source:

The input and decay of material from major volcanic eruptions is readily observed
but changes in the underlying “background” have also been noted. Hofmann and coworkers (12–14) argued that the “background” stratospheric aerosol layer increased by 5-
9%/year through the 1960s, 1970s, and 1980s, and again at about 5-7% in the 2000s. However, in the 1990s stratospheric aerosols decreased by similar magnitudes

Satellite instruments provide evidence that smaller volcanic eruptions can play a more significant role in affecting the background stratospheric aerosol burden than has often been thought (16, 17). Figure 1 shows the first 4 years of aerosol load in the lower stratosphere (17-21 km) from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) lidar measurements since the beginning of its mission in June 2006 [after (15), see also fig. S1]. These data indicate that emissions from two relatively minor tropical eruptions reached the stratosphere in significant amounts, in particular those from Soufrière Hills and Tavurvur (Fig. 1 and fig. S1). There is also some contribution to the global aerosol optical depth increase from summer season mid- to high-latitude eruptions that spread across much of the globe (16, 18, 19), but these may have a smaller effect on global climate change than lower latitude eruptions (19).

Source


No evidence of geoengineering. Just evidence that we have much to learn about the complex thing known as global climate and the things that influence it.