Cooler Pacific 'Is Slowing Warming'
Scientists believe they have made significant progress towards explaining why global average surface temperatures have risen more slowly this century than previously.
Join the discussion below, or Read more at Truthdig.
#1 Sep 1, 2013
If the natural process is causing cooling then the same natural process in it's opposite phase caused the warming.
Add in the highest levels of solar activity recorded in the last 400 years, just so happened to have occurred at the same time as the positive phase of the PDO, and you get global warming.
The sun is in a very low activity phase and the PDO is negative, cooling is in our future.
When the PDO switches back to positive approx 25 years from now, the sun is predicted to still be in a low activity phase.
The solar prediction is based on historical patterns and solar inertial motion. This process was used to correctly predict our current cycle 24 activity.
#2 Sep 1, 2013
It is well known that CO2 warms the planet, but less well-known that it also makes the alkaline seas more acidic when it is absorbed from the air.
Absorption is particularly fast in cold water so the Arctic is especially susceptible, and the recent decreases in summer sea ice have exposed more sea surface to atmospheric CO2.
The Arctic's vulnerability is exacerbated by increasing flows of freshwater from rivers and melting land ice, as freshwater is less effective at chemically neutralising the acidifying effects of CO2.
The researchers say the Nordic Seas are acidifying over a wide range of depths - most quickly in surface waters and more slowly in deep waters.
The reports chairman, Richard Bellerby from the Norwegian Institute for Water Research, told BBC News that they had mapped a mosaic of different levels of pH across the region, with the scale of change largely determined by the local intake of freshwater.
Large rivers flow into the Arctic, which has an enormous catchment for its size, he said.
Theres slow mixing so in effect we get a sort of freshwater lens on the top of the sea in some places, and freshwater lowers the concentration of ions that buffers pH change. The sea ice has been a lid on the Arctic, so the loss of ice is allowing fast uptake of CO2.
This is being made worse, he said, by organic carbon running off the land a secondary effect of regional warming.
Continued rapid change is a certainty, he said.
We have already passed critical thresholds. Even if we stop emissions now, acidification will last tens of thousands of years. It is a very big experiment.
The research team monitored decreases in seawater pH of about 0.02 per decade since the late 1960s in the Iceland and Barents seas.
Chemical effects related to acidification have also been encountered in surface waters of the Bering Strait and the Canada Basin of the central Arctic Ocean.
Scientists estimate that the average acidity of surface ocean waters worldwide is now about 30% higher than before the Industrial Revolution.
Since: Apr 08
"the green troll"
#3 Sep 2, 2013
Despite the deep oceans absorbing heat, lower solar irradiance and increased aerosols from coal burning and volcanic activity, the world is not actually cooling is it?
Even in a cherry picked period beginning with a super El Nino and ending with two La Nina years, it's not actually cooling is it?
On the other hand, over the last few decades, it has warmed a lot.
If the world were cooling, your argument would be valid.
But it's not, is it?
Add your comments below
|Scientists Beg for Climate Action (Dec '07)||Dec 4||Patriot||1,864|
|Lost in the sea||Sep '16||clement||1|
|The world's clouds are in different places than...||Jul '16||Too Easy||14|
|Sea level rise: It's worse than we thought (Jul '09)||Jul '16||litesong||3,768|
|With La Nina around the corner, dry weather in ... (Jun '16)||Jun '16||Kev||1|
|new Scientists find minivan-sized sponge, world... (May '16)||May '16||Jack||8|
|As Canada probes Haida Gwaii ocean fertilizing,... (Apr '16)||Apr '16||lotsa fish poop p...||1|
Find what you want!
Search Oceanography Forum Now
Copyright © 2016 Topix LLC