15. Holocene sea level rise

15. Holocene sea level rise - Pre-show: Bill Cosby Noah 15....

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15. Review: Instrument scale sea-level rise Holocene sea level rise Holocene climate change Noah’s flood
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Insolation maximum 11 ka 65°N Holocene last 10,000 years Spread of agriculture into Europe (modified from NOAA webpage after Ruddiman, 2001) Holocene late Pleistocene Future Present and Future = Anthropocene Data from Laskar; plot by Miller
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Holocene: last 10,000 years interglacial http://commons.wikimedia.org/wiki/File:Holocene_Temperature_Variations.png source: Wikipedia prepared by Robert A. Rohde from published dats incorporated into the Global Warming Art project.
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Holocene climatic optimum? http://www.ncdc.noaa.gov/paleo/globalwarming/im ages/polarbigb.gif NOAA answers the question Was the "middle Holocene" or a period roughly from 7,000 to 5,000 years ago, warmer than the present day? “mid-Holocene, roughly 6,000 years ago, was generally warmer than today, but only in summer and only in the northern hemisphere” Based on foraminiferal sea surface temperature estimates of 2-4°C warmer in June in Arctic and subarctic (Kerwin et al., 1999) Any mid-Holocene warmth was in northern hemisphere and caused by Milankovitch; globally it was < 0.5°C warmer than 20th century baseline and not past warm as 21st century
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last 7,000 years minimal temperature change Temperature record for summer time northernmost Europe (Lapland, Finland, and Norway; Karasjok , 14°C is modern calibration point; at least 1.5°C warmer in 2010 than 5000 BCE) This study Helama et al. (2010) shows a good correlation of millennial scale climate change with solar output The key: minimal temperature difference(actually cooler) in this key high latitude location at 7 ka (5,000 BCE) vs. today
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Evolution of humans First Homo 1.8-2.5 Ma, first Homo sapiens sapiens ~200 ka ; arrives in Europe ~50 ka, first agriculture 10 ka (= city Jericho?) http://wxww.historum.com/general-history/8609-civilizations-timeline.html
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Birth of civilization http://wxww.historum.com/general-history/8609-civilizations-timeline.html First agriculture Summerians (Iraq) 9.5 ka, flooding of Black Sea ca. 7.6 ka; first written ca. 5.5 ka = beginning of history (vs. prehistory)
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Clicker question The early Holocene climatic optimum A) Was globally 2-4°C warmer than today B) Was mostly in high northern latitudes and not much, if any, warmer than today C) Occurred immediately after the Younger Dryas D) Is completely made up
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Clicker question The beginning of agriculture may be linked to: A) Flooding of the Black Sea B) Warming of climate and beginning of the Holocene C) Beginning of history D) A wet period associated with a more intense monsoon
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data incorporated into the Global Warming Art project. Holocene sea-level rise
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15. Holocene sea level rise - Pre-show: Bill Cosby Noah 15....

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