In:
Science, American Association for the Advancement of Science (AAAS), Vol. 325, No. 5946 ( 2009-09-11), p. 1374-1377
Abstract:
The hydrological cycle and its response to environmental variability such as temperature changes is of prime importance for climate reconstruction and prediction. We retrieved deuterated water/water (HDO/H 2 O) abundances using spaceborne absorption spectroscopy, providing an almost global perspective on the near-surface distribution of water vapor isotopologs. We observed an unexpectedly high HDO/H 2 O seasonality in the inner Sahel region, pointing to a strong isotopic depletion in the subsiding branch of the Hadley circulation and its misrepresentation in general circulation models. An extension of the analysis at high latitudes using ground-based observations of δ D ¯ and a model study shows that dynamic processes can entirely compensate for temperature effects on the isotopic composition of precipitation.
Type of Medium:
Online Resource
ISSN:
0036-8075
,
1095-9203
DOI:
10.1126/science.1173791
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2009
detail.hit.zdb_id:
128410-1
detail.hit.zdb_id:
2066996-3
detail.hit.zdb_id:
2060783-0
SSG:
11
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