Flashcards
ES200 (1/21)
Flashcards do conjunto (21)
- 1What are proxiesa substitute for temp measurements(i.e. tree rings, pollen, oxygen iso, etc.)
used to estimate temperatures of earth in the past - 2Stomatapores in leaves more of them means cooler temperature
- 3O isotope used in climate researchO-18
- 4how O-18 is usedratio between O-16(normal oxygen) and O-18 used to estimate temp
(sample-standard/standard)x1000 = delta 18-O - 5standard for OxygenStandard Mean Ocean Water if more O-18 than normal in ratio means colder
- 6What chemical used to estimate O-18/O-16CACO3 in shells of foraminifera
- 7How does O get in shellswhen the shell forms O comes from the ocean around it hydrogen combining with CO2 forming carbonic acid (red shells high O-18, black low O18)
- 8how are shells collectedget samples from drilling into ocean floor
- 9When is Holocene epochlast 12,000 years
- 10what epoch did the ice age occurPleistocene Epoch
- 11What 'caused' high temps 250myavolcanism(flood basalt)
- 12CO2 55mya(compared to today)2.5-5x today
- 13glacierlong-lasting body of ice large enough to move under it's own weight at least 10s of m
- 14evidence for extent of glacial coverageboulders moved from source of bedrock, glacial striations
- 15# of times glaciers advanced and receded over last 500,000years5, drop 5 degrees C glaciers will form
- 16how does rock weathering remove CO2consumed by chemical weathering creating CaCO3 rock or shells
- 17MilanKovitch Cylesvariations in earth orbits when summers get less sun glaciers advance
- 18eccentricitythe elliptical orbit of the sun by the earth
- 19temperature anomalydifference from baseline avg on same date
- 20why not average temps to get global avgmost collected data in developed countries
- 21—
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- O usuário eliminou as informações de disciplina FlashCards sobre ES200 (1/21), criado por Usuário eliminado em 12-02-2020.
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- Usuário eliminado · fev 2020
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- Criado por Jacob Sipple · 16 jan 2020
- Copiado por Jacob Sipple · 12 fev 2020
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