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RE: Climate Changes Mid-late Dinosaur era.
> From: firstname.lastname@example.org [mailto:email@example.com]On Behalf Of
> Daniel Bensen
> Global temperatures must have been quite warm indeed, and the temperature
> differences between latitudes very low. Palm trees grew on Spitsbergen aka
> Svalbard, champsosaurs thrived on Bylot island in the northern Canadian
> Arctic (Nunavut meanwhile)...<<
> Hey! How does that work? A homogeneous global climate? I
> thought that was
> only in science fiction. What could explain such a thing?
Much reduced latitudinal gradient, yes.
Factors that allowed for a reduced difference between poles and equator:
*Many epieric seas, so changes in global albedo AND ameliorating
water (reduced seasonal extremes) reach much more of the land area
*Increased CO2 levels
*Possibly different style circulation in oceans
One important thing to remember about historical geology is that although
"the present is the key to the past", many aspects of the
Earth-Ocean-Atmosphere system are variable through time (i.e., continental
configuration, atmospheric composition, sea level, etc.).
Thomas R. Holtz, Jr.
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
College Park, MD 20742
Phone: 301-405-4084 Email: firstname.lastname@example.org
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796