ACC Panel on Advancing the Science of Climate Change. Wunder Blog. Climate denial activists’ parallel to anti-relativity movement o... 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). 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. Surface air temperature anomaly in 2011 relative to the 1951-1980 base period at (a) 1200 km resolution, and (b) 250 km resolution. + View as PDF 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. 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. 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.
They can also be used to track the Antarctic ice. I'm not an ice scientist so I will limit commentary about the web sites. In general, the data and the web sites speak for themselves. National Snow and Ice Data Center (NSIDC) These people are the real deal in anything to do with ice and snow. Cryosphere Today This site has a lot of interesting and historic data. This graph shows ice area. CT has an interesting comparison app to compare any two single days of ice extent (and snow for recent years). Canadian Ice Service The Canadian Ice Service has interesting data for the North American Arctic. Polar Science Center This is a new site that tracks ice volume. 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. Arctic Ocean | Western Arctic | Eastern Arctic | Hudson Bay | East Coast | Great Lakes Full Resolution Map | Animated Map (last 10 days) This map displays the latest ice cover in Canadian waters. To learn more about our products and how to interpret them, take a look at our Ice Products Guide. Arctic Sea Ice News & Analysis. The sea ice extent has been quickly growing, and by the end of October, ice covered most of the Arctic Ocean. Overall, the ice extent remained below average for this time of year in the Barents and Kara Seas, as well as within northern Baffin Bay and the East Greenland Sea. Overview of conditions Figure 1. Arctic sea ice extent for October 2021 was 6.77 million square kilometers (2.61 million square miles). The magenta line shows the 1981 to 2010 average extent for that month.
Sea Ice Index data. About the data Credit: National Snow and Ice Data CenterHigh-resolution image The monthly average extent for October 2021 was 6.77 million square kilometers (2.61 million square miles). Conditions in context Figure 2a. Credit: National Snow and Ice Data CenterHigh-resolution image Figure 2b.
Credit: NSIDC courtesy NOAA Earth System Research Laboratory Physical Sciences Laboratory High-resolution image Figure 2c. October 2021 compared to previous years Figure 3. Figure 4. Figure 5. References. 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).
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. Many thanks to Tenney Naumer of Climate Change: The Next Generation who emailed me the graph. Thanks also to John Wahr at the University of Colorado who analysed the GRACE data and granted permission to reproduce it here. Figure 1: Greenland ice mass anomaly (black). This graph includes 12 months more data than Velicogna 2009 and shows the rate of ice mass loss is still increasing. Figure 2: Rate of ice loss from Greenland. What we find is over a longer time period, Greenland was in approximate mass balance in the early 1990s.
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. 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). To make the two series coherent in time, I spline-interpolated both to a common time step of one point each thousand years.
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. GISS: Science Briefs: Whither U.S. Climate? Whither U.S. Climate? By James Hansen, Reto Ruedy, Jay Glascoe and Makiko Sato — August 1999 What's happening to our climate? Was the heat wave and drought in the Eastern United States in 1999 a sign of global warming? Empirical evidence does not lend much support to the notion that climate is headed precipitately toward more extreme heat and drought. How can the absence of clear climate change in the United States be reconciled with continued reports of record global temperature? A picture of how U.S. climate change during the past half century compared with the rest of the world is shown in Figure 2. Yet in the U.S. there has been little temperature change in the past 50 years, the time of rapidly increasing greenhouse gases — in fact, there was a slight cooling throughout much of the country (Figure 2).
Is this a temporary fluke, a chaotic regional climate fluctuation? But that only changes the question: what is the cause of the Atlantic cooling? Reference Hansen, J., D. Hansen, J., R. 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.”
It’s just hard to stop the march of manmade global warming, well, other than by reducing greenhouse gas emissions, that is. 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. 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. I wrote an article on this subject in 2008, “The cold truth about climate change: [Disinformers] continue to insist there’s no consensus on global warming. When James Hansen read the first draft of the piece, he wrote me back, “Very important for the public to understand this “” why has nobody articulated this already?” The subject arises again because of some ill-chosen words by climatologist Mike Hulme in an article, “Climate Change: what do we know about the IPCC?
Hulme has now issued two clarifications on his website. Lacis had commented on the Fourth Assessment, “There is no scientific merit to be found in the Executive Summary.” And Doh! Global Warming and Climate Change skepticism examined. NOAA Climate Services.