CO2in the upper troposphere: Influence of stratosphere-troposphere exchange
نویسندگان
چکیده
منابع مشابه
CO2 in the upper troposphere: Influence of stratosphere-troposphere exchange
[1] A two-dimensional transport model constrained to measured surface CO2 concentrations was used to simulate the spatial and temporal variation of CO2 in the atmosphere for the period from 1975 to 2004. We find that the amplitude, phase and shape of the CO2 seasonal cycle vary as a function of both altitude and latitude. Cross tropopause exchanges, especially the downward branch of the Brewer-...
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In the past, studies of stratosphere-troposphere exchange of mass and chemical species have mainly emphasized the synopticand small-scale mechanisms of exchange. This review, however, includes also the global-scale aspects of exchange, such as the transport across an isentropic surface (potential temperature about 380 K) that in the tropics lies just above the tropopause, near the 100-hPa press...
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[1] The extratropical upper troposphere and lower stratosphere (Ex‐UTLS) is a transition region between the stratosphere and the troposphere. The Ex‐UTLS includes the tropopause, a strong static stability gradient and dynamic barrier to transport. The barrier is reflected in tracer profiles. This region exhibits complex dynamical, radiative, and chemical characteristics that place stringent spa...
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[1] An analytic model of transport and microphysics in the tropical tropopause layer (TTL) is extended to include stable isotopes of water. The model, running along trajectories, is tested against in situ and satellite observations of HDO and H2 O in the Upper Troposphere and Lower Stratosphere (UT/LS). The model is able to reproduce the range of isotopic depletions observed in the data, and re...
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This study discusses the direct diagnosis of stratosphere–troposphere exchange. The method introduced by Wei is applied to the Goddard Earth Observation System assimilated dataset. In many respects, the results generally agree with those of other studies using the same method and different datasets. However, sensitivity tests and theoretical considerations indicate that the instantaneous two-wa...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2006
ISSN: 0094-8276
DOI: 10.1029/2006gl026141