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ACC Panel on Advancing the Science of Climate Change. Wunder Blog. Climate denial activists’ parallel to anti-relativity movement o... Caldeira slams anti-scientific witchhunts: “Are American politic. By Joe Romm on May 9, 2010 at 10:32 am "Caldeira slams anti-scientific witchhunts: “Are American politicians following in the footsteps of Stalin?”

Caldeira slams anti-scientific witchhunts: “Are American politic

" U-VA faculty Senate: Cuccinelli actions threaten “our ability to generate the knowledge upon which informed public policy relies.” Climate scientist Ken Caldeira commented on my recent post, “WashPost: University of Virginia should fight AG Cuccinelli’s faulty investigation of Michael Mann.” Since it’s well worth reading, I am reprinting it below — along with the powerful conclusion of the University of Virginia Faculty Senate Executive Council statement. I gave Caldeira a chance to edit his statement, since commenting does not always perfectly express one’s thoughts: Last week, the University of Virginia Faculty Senate Executive Council issued a “Position Statement on Attorney General’s Investigation of Dr. U.S. National Academy of Sciences labels as “settled facts” that. Logical Science. Data.GISS: GISS Surface Temperature Analysis: 2011 Annual Analysis.

Global Temperature in 2011, Trends, and Prospects By James Hansen, Reto Ruedy, Makiko Sato and Ken Lo — 18 January 2012 The annual 2011 surface air temperature anomaly relative to base period 1951-1980 is shown in Fig. 1 at both the 1200 km and 250 km resolutions of the GISS analysis (Hansen et al., 2010).

Data.GISS: GISS Surface Temperature Analysis: 2011 Annual Analysis

The global mean anomaly, averaged over the area with a defined anomaly is 0.51°C for 1200 km resolution and 0.44°C for 250 km resolution. The 1200 km resolution analysis, because it fills in estimated anomalies in Africa, Canada, Siberia, and especially in the Arctic, is believed to provide the better estimate for the full global anomaly, as discussed by Hansen et al. (2010) (note 1). Figure 1. The global temperature anomaly from 1880 through 2011 is shown in Fig. 2 for the standard (1200 km resolution data) GISS analysis (note 2). Figure 2. Figure 3. Websites to monitor the Arctic Sea Ice.

Posted on 28 May 2010 by michael sweet Guest post by Michael Sweet The Arctic melt season is starting to get into gear.

Websites to monitor the Arctic Sea Ice

The ice really starts to melt in June and it'll be interesting to see what develops this year. This post is to describe some web sites I've found to be useful to monitor the summer ice melt in the northern hemisphere. Ice Safety. At the Canadian Ice Service (CIS), our mission is to provide the most accurate and timely information about ice in Canada's navigable waters.

We work to promote safe and efficient maritime operations and to help protect Canada's environment. For the latest ice conditions, click the appropriate regional area on the map. As Arctic sea ice shrinks faster than 2007, NSIDC director Serre. By Joe Romm on May 24, 2010 at 7:57 pm "As Arctic sea ice shrinks faster than 2007, NSIDC director Serreze says, “I think it’s quite possible we could “break another record this year.”

As Arctic sea ice shrinks faster than 2007, NSIDC director Serre

" Arctic Sea Ice News & Analysis. On September 11, Arctic sea ice reached its likely minimum extent for 2015.

Arctic Sea Ice News & Analysis

The minimum ice extent was the fourth lowest in the satellite record, and reinforces the long-term downward trend in Arctic ice extent. Sea ice extent will now begin its seasonal increase through autumn and winter. In the Antarctic, sea ice extent is average, a substantial contrast with recent years when Antarctic winter extents reached record high levels.

Please note that this is a preliminary announcement. Changing winds or late-season melt could still reduce the Arctic ice extent, as happened in 2005 and 2010. Overview of conditions Figure 1. Credit: National Snow and Ice Data CenterHigh-resolution image On September 11, 2015, sea ice extent dropped to 4.41 million square kilometers (1.70 million square miles), the fourth lowest minimum in the satellite record. The minimum extent was reached four days earlier than the 1981 to 2010 average minimum date of September 15. Polar Sea Ice Cap and Snow - Cryosphere Today. Latest GRACE data on Greenland ice mass. Posted on 28 May 2010 by John Cook I don't plan to fall into the trap of breathlessly reporting every twist and turn of short-term climate fluctuations (I went through a bit of a silly period in March and April 2008).

Latest GRACE data on Greenland ice mass

But we've been discussing Greenland trends and as it's been over a year since posting GRACE data on Greenland ice mass so I figure we're due an update. On temperature and CO2 in the past. Posted on 29 May 2010 by Riccardo Guest post by Riccardo One of the most famous paleoclimate graphs for "amateur climatologists" like me is the Vostok ice core reconstructions of temperature and CO2 concentration over the last 420 kyr.

On temperature and CO2 in the past

It shows how nicely the two follow each other and that our climate has overall "oscillated" within two relatively well defined limits. One may wish to look at this correlation a little better. So let's take the Dome C ice core data which cover 800 Kyrs and plot temperature versus CO2 concentration. Fig. 1: Dome C temperature and CO2 concentration data (dots) with the best fit line (red line). This graph shows how our climate system behaves naturally.

This concept is made explicit in a recent paper (Etkin 2010) where the author makes a state-space (or phase-space) analysis of ice cores and recent instrumental measurements. Fig. 2: State-space plot of the Vostok, EPICA and Law Dome ice core data and Mauna Loa direct measurements. GISS: Science Briefs: Whither U.S. Climate? Whither U.S.

GISS: Science Briefs: Whither U.S. Climate?

Climate? By James Hansen, Reto Ruedy, Jay Glascoe and Makiko Sato — August 1999. Monckton Chronicles Part IV– Medieval Warm Period? Skeptical Science: Examining Global Warming Skepticism. NOAA: Warmest May, spring, and Jan-May on record « Climate Progr. By Joe Romm on June 15, 2010 at 5:03 pm "NOAA: Warmest May, spring, and Jan-May on record" NOAA’s National Climatic Data Center has published its monthly “State of the Climate Report.” The combined global land and ocean surface temperature was the warmest on record for May, March-May (Northern Hemisphere spring-Southern Hemisphere autumn), and the period January-May. The warming in May is greatest precisely where climate science suggested it would be — the high northern latitudes (see “What exactly is polar amplification and why does it matter?”

— precisely the worst possible place from the perspective of amplifying feedbacks (see “Tundra 4: Permafrost loss linked to Arctic sea ice loss“): And it bears repeating, the record temperatures we’re seeing now are especially impressive because we’ve been in “the deepest solar minimum in nearly a century.” Will we break records for the whole year? Disputing the ‘consensus’ on global warming « Climate Progress. By Joe Romm on June 16, 2010 at 3:49 pm "Disputing the ‘consensus’ on global warming" Science is in many ways the opposite of decision by consensus.

Disputing the ‘consensus’ on global warming « Climate Progress

I have never liked the use of the word “consensus” as it is typically applied in the climate arena. Scientists don’t really have a ‘consensus’ so much as they have an ‘understanding‘ of climate science. Global Warming and Climate Change skepticism examined. NOAA Climate Services.