7. instrumenttemperature

7. instrumenttemperature - Pre-show: Global warming Wont...

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Pre-show: Global warming Won’t get fooled again!
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7. Reconstructing temperature & climate: instrument scale (1850-present) Surface and satellite temperature measurements: is it warming? High latitude meltdown: Canary in the coal mine? Controversy revealed: Climategate, Crichton, and other bad science fiction
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Global Temperature GISS http://data.giss.nasa.gov/gistemp/graphs/ NASA GISS 1880-2009 global mean surface temperature change relative to the 1961–1990 average. Unsmoothed (black) and 5-year running mean (red) Hansen et al., 2006
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Global Temperature NOAA The U.S. Climate Reference Network consists of 114 stations, including this one in Tucson, AZ Relative to 1901-200 average; annual series NOT smoothed
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Global Temperature: How do they do this? “What is a temperature anomaly? The term “temperature anomaly” means a departure from a reference value or long-term average. A positive anomaly indicates that the observed temperature was warmer than the reference value, while a negative anomaly indicates that the observed temperature was cooler than the reference value. What datasets are used in calculating average global temperature anomaly? Land surface temperatures are available from the Global Historical Climate Network (GHCN). Sea surface temperatures are determined using the extended reconstructed sea surface temperature (ERSST) analysis.” 144 U.S stations Both raw annual averages and smoothed functions are shown. http://www.ncdc.noaa.gov/cmb-faq/anomalies.html PA Avondale 2 N, Stroud Water Research Center
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Global Temperature NOAA Raw with errors (black), smoothed (blue), and anomaly relative to 1901-200 average; areas in red are anomalous (both cold prior to 1940 and warm since 1980)
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Global Temperature Hadley-UK Met office Average relative to 1961-1990 Annual series smoothed 21-point binomial filter
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Clicker question: Who at Rutgers is on the IPCC? A. James Gandolfini B. Tony Broccoli, Paul Falkowski, Alan Robock C. Tony Asparagus, Vivian Stringer, Fat Daryl
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Recovery from volcanic eruptions dominates Greenhouse gases dominate Tropospheric aerosols mask warming (global dimming) Interpretation of 20th Century Temperature 0.4°C warming 1910-1940 due to natural warming; stable (not cooling) 1940- 1980 due to global dimming/other, 0.6-0.7°C warming 1980-2005 GHG
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Clicker question: how do these graphs differ? Fact: One shows 0.4°C warming over average and the other shows 0.4°C A. One shows climate and one shows weather B. The mean has been shifted 0.2°C since averaging period is different C. The Brits (right) got it wrong D. Surface temperature data is uncertain by 0.2°C E. There is no difference
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Biases in Temperature records 1850-present Biased toward northern hemisphere, especially early records
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These 2 stations given the same weight? Integration of their coverage areas is very different. .. - Areal coverage using “nearest
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This note was uploaded on 12/16/2011 for the course SEA CHANGE 110 taught by Professor Miller during the Spring '11 term at Rutgers.

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7. instrumenttemperature - Pre-show: Global warming Wont...

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