23 Julio: Charla: "High and Dry: Water Vapor Dynamics in the Arid Subtropics"


Te invitamos a la Charla del Dr.Joseph Galewsky, University of New Mexico, Albuquerque, NM, USA.

«High and Dry: Water Vapor Dynamics in the Arid Subtropics»

Miércoles 23 Julio 2014

14:30 hrs.



(Blanco Encalada 2002)

La charla será transmitida por streaming en: https://new.livestream.com/accounts/7520184



Advances in instrumentation provide new opportunities to advance our understanding of large-scale water vapor dynamics in the arid subtropics.  Cavity ringdown spectroscopy of water vapor isotopic composition from Hawaii’s Mauna Loa Observatory and Chile’s Chajnantor Plateau are consistent with previous measurements from the base of the tropical tropopause layer (TTL), with water vapor concentrations below200 ppmv and water vapor dD values as low as -540 per mil, consistent with large-scale subsidence from the TTL to the Earth’s surface at this site.  These measurements provide new constraints on the relative roles of large-scale mixing and convection in controlling subtropical humidity and on ice supersaturation processes in the upper troposphere.  Long-term monitoring of water vapor isotopic composition at these sites may help to constrain the processes associated with the projected moistening of the subtropics under global warming.


Para ver la charla en directo: https://new.livestream.com/accounts/7520184

(página: http://new.livestream.com/ Canal: “Difusión CR2”/ cr2prensa@gmail.com)