With pollen & microfossils
This presentation is the property of its rightful owner.
Sponsored Links
1 / 25

with pollen & microfossils indicating warm temps. PowerPoint PPT Presentation


  • 89 Views
  • Uploaded on
  • Presentation posted in: General

with pollen & microfossils indicating warm temps. Amazon.com. http://www.jsc.nasa.gov/images/eol/2003/owenslake.html. http://www.owensvalleyhistory.com/ov_aqueduct1/page19.html. http://www.epa.gov/region09/air/owens/. Global warming and freshwater supply in Asia….

Download Presentation

with pollen & microfossils indicating warm temps.

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


With pollen microfossils indicating warm temps

with pollen & microfossils

indicating warm temps.


With pollen microfossils indicating warm temps

Amazon.com

http://www.jsc.nasa.gov/images/eol/2003/owenslake.html

http://www.owensvalleyhistory.com/ov_aqueduct1/page19.html

http://www.epa.gov/region09/air/owens/


With pollen microfossils indicating warm temps

Global warming and freshwater supply in Asia…

The Himalayan glaciers feed seven of the great rivers of Asia (the Ganges, Indus, Brahmaputra, Salween, Mekong, Yangtze and Huang He) and supply fresh (melt) water runoff to 1/3 of the world’s population (~ 2 billion people).

http://assets.panda.org/downloads/glacierspaper.pdf

http://upload.wikimedia.org/wikipedia/commons/7/79/Himalayas.jpg


With pollen microfossils indicating warm temps

Reconstructing climates is detective work.

Sherlock Holmes: A Study in Scarlet, p. 57

Most people, if you describe a train of events to them, will tell you what the result would be. They can put those events together in their minds, and argue from them that something will come to pass. There are few people, however, who, if you told them a result, would be able to evolve from their own inner consciousness what the steps were which led up to that result. This power is what I mean when I talk of reasoning backwards, or analytically."


With pollen microfossils indicating warm temps

Natural archives

http://www.aims.gov.au/pages/research/darwin/dhwqmp/dhwq-200-03.html

https://www.e-education.psu.edu/gened/egee101/Examples/109_temperature_new.html

http://www.research.noaa.gov/spotlite/archive/images/liquidgold_treering.jpg


With pollen microfossils indicating warm temps

Instrumental or historical archives

http://banana.ifa.hawaii.edu/Weather/weather_station.gif

Price of rye in Germany vs. time expressed as an index. (Source: Lamb, 1995)

http://www2.sunysuffolk.edu/mandias/lia/little_ice_age.html


With pollen microfossils indicating warm temps

Sediment accumulates in “low spots”


With pollen microfossils indicating warm temps

http://www.usssp-iodp.org/Education/One_core.html

http://iodp.tamu.edu/scienceops/maps/iodp_odp_dsdp.gif


What are the sediment archives and what can they tell us

What are the sediment archives and what can they tell us?

Sediment ArchiveProxy Indicator of

coarse sand fraction of

biogenic materialsurface and deep water environmental conditions

lithic grains (ice-rafted debris)glacial activity on land

volcanic ashvolcanic activity on land


With pollen microfossils indicating warm temps

Biological clues

Azolla: freshwater fern spore

pollen

http://www.immediart.com/catalog/images/big_images/NS_PN_B786630-Pollen_grain,_ESEM-SPL.jpg

http://www.water.sannet.ne.jp/nirei/palynology/zukan/spore01.jpg


With pollen microfossils indicating warm temps

Developmental

Steps in SST History

G.

T.

Polar type

The dominant planktonic species, indicating presence of cool surface waters

Non-polar types


With pollen microfossils indicating warm temps

Types physical and compositional evidence of past environments

Illite clay: physical weathering

Kaolinite clay: chemical weathering

http://www.ualberta.ca/~jwaldron/gallerypages/wavetide.html

http://www.oum.ox.ac.uk/children/minerals/potplant.htm


With pollen microfossils indicating warm temps

http://www.koshland-science-museum.org/exhibitgcc/historical10.jsp

http://en.wikipedia.org/wiki/Ice_core


With pollen microfossils indicating warm temps

http://the-periodic-table.org/printable.gif


With pollen microfossils indicating warm temps

Determining age – isotopic decay “clocks”


With pollen microfossils indicating warm temps

Determining age – isotopic decay “clocks”


With pollen microfossils indicating warm temps

Determining age – isotopic decay “clocks”


With pollen microfossils indicating warm temps

Determining age – counting backwards (seasonal or annual layers)

http://www.geo.arizona.edu/Antevs/nats104/00lect11.html


With pollen microfossils indicating warm temps

Determining age – matching to known patterns

magnetic pole reversal pattern

http://www.geo.arizona.edu/palynology/geos462/pmabutlr.gif


With pollen microfossils indicating warm temps

Determining age – matching to known patterns

Glacial-interglacial cycles


With pollen microfossils indicating warm temps

Resolution of record - How detailed can you get?

depends on sedimentation (accumulation) rate


With pollen microfossils indicating warm temps

Resolution of record - How detailed can you get?

depends on how disturbed archive is

http://www-odp.tamu.edu/publications/207_IR/chap_06/c6_f7.htm


With pollen microfossils indicating warm temps

What archives you use depends on the timespan you are trying to reconstruct.

And – the more clues the better – aim for amultiproxy approach.


  • Login