scholarly journals Influence of convective processes on the isotopic composition (δ18O andδD) of precipitation and water vapor in the tropics: 2. Physical interpretation of the amount effect

2008 ◽  
Vol 113 (D19) ◽  
Author(s):  
Camille Risi ◽  
Sandrine Bony ◽  
Françoise Vimeux
Keyword(s):  
Water Vapor ◽  
Isotopic Composition ◽  
Physical Interpretation ◽  
Amount Effect ◽  
Convective Processes ◽  
The Tropics

Stable isotopic composition of water vapor in the tropics

2004 ◽  
Vol 109 (D6) ◽  
pp. n/a-n/a ◽  
Author(s):  
James Robert Lawrence ◽  
Stanley David Gedzelman ◽  
Darielle Dexheimer ◽  
Hye-Khung Cho ◽  
Gordon D. Carrie ◽  
...  
Keyword(s):  
Water Vapor ◽  
Isotopic Composition ◽  
Stable Isotopic Composition ◽  
Stable Isotopic ◽  
The Tropics

Preliminary research on isotopic composition of water vapor in irrigated fields

2012 ◽  
Vol 19 (5) ◽  
pp. 1060-1066 ◽  
Author(s):  
Yu-Cui ZHANG ◽  
Ying-Zhe CAI ◽  
Parkes Stephen ◽  
McCabe Matthew F. ◽  
Fan YANG ◽  
...  
Keyword(s):  
Water Vapor ◽  
Isotopic Composition ◽  
Preliminary Research

Isotopic composition of precipitation over Arid Northwestern China and its implications for the water vapor origin

2009 ◽  
Vol 19 (2) ◽  
pp. 164-174 ◽  
Author(s):  
Jianrong Liu ◽  
Xianfang Song ◽  
Xiaomin Sun ◽  
Guofu Yuan ◽  
Xin Liu ◽  
...  
Keyword(s):  
Water Vapor ◽  
Isotopic Composition ◽  
Northwestern China ◽  
Arid Northwestern China

scholarly journals A statistical analysis of the influence of deep convection on water vapor variability in the tropical upper troposphere

2009 ◽  
Vol 9 (15) ◽  
pp. 5847-5864 ◽  
Author(s):  
J. S. Wright ◽  
R. Fu ◽  
A. J. Heymsfield
Keyword(s):  
Water Vapor ◽  
Deep Convection ◽  
Tropical Rainfall Measuring Mission ◽  
Upper Troposphere ◽  
Ambient Relative Humidity ◽  
Wide Range ◽  
Ice Water Content ◽  
The Tropics ◽  
Ice Water ◽  
Tropical Upper Troposphere

Abstract. The factors that control the influence of deep convective detrainment on water vapor in the tropical upper troposphere are examined using observations from multiple satellites in conjunction with a trajectory model. Deep convection is confirmed to act primarily as a moisture source to the upper troposphere, modulated by the ambient relative humidity (RH). Convective detrainment provides strong moistening at low RH and offsets drying due to subsidence across a wide range of RH. Strong day-to-day moistening and drying takes place most frequently in relatively dry transition zones, where between 0.01% and 0.1% of Tropical Rainfall Measuring Mission Precipitation Radar observations indicate active convection. Many of these strong moistening events in the tropics can be directly attributed to detrainment from recent tropical convection, while others in the subtropics appear to be related to stratosphere-troposphere exchange. The temporal and spatial limits of the convective source are estimated to be about 36–48 h and 600–1500 km, respectively, consistent with the lifetimes of detrainment cirrus clouds. Larger amounts of detrained ice are associated with enhanced upper tropospheric moistening in both absolute and relative terms. In particular, an increase in ice water content of approximately 400% corresponds to a 10–90% increase in the likelihood of moistening and a 30–50% increase in the magnitude of moistening.

scholarly journals Isotopic composition of bare soil evaporated water vapor. Part I: RUBIC IV experimental setup and results

2009 ◽  
Vol 369 (1-2) ◽  
pp. 1-16 ◽  
Author(s):  
I. Braud ◽  
P. Biron ◽  
T. Bariac ◽  
P. Richard ◽  
L. Canale ◽  
...  
Keyword(s):  
Water Vapor ◽  
Isotopic Composition ◽  
Bare Soil ◽  
Experimental Setup

scholarly journals Controls on the water vapor isotopic composition near the surface of tropical oceans and role of boundary layer mixing processes

2019 ◽  
Author(s):  
Camille Risi ◽  
Joseph Galewsky ◽  
Gilles Reverdin ◽  
Florent Brient
Keyword(s):  
Water Vapor ◽  
Isotopic Composition ◽  
General Circulation ◽  
Model Simulation ◽  
Circulation Model ◽  
Sea Surface ◽  
Trade Wind ◽  
Mixing Processes ◽  
Tropical Oceans ◽  
Air Mixing

Abstract. Understanding what controls the water vapor isotopic composition of the sub-cloud layer (SCL) over tropical oceans (δD0) is a first step towards understanding the water vapor isotopic composition everywhere in the troposphere. We propose an analytical model to predict δD0 as a function of sea surface conditions, humidity and temperature profiles, and the altitude from which the free tropospheric air originates (zorig). To do so, we extend previous studies by (1) prescribing the shape of δD0 vertical profiles, and (2) linking δD0 to zorig. The model relies on the hypotheses that δD0 profiles are steeper than mixing lines and no clouds are precipitating. We show that δD0 does not depend on the intensity of entrainment, dampening hope that δD0 measurements could help constrain this long-searched quantity. Based on an isotope-enabled general circulation model simulation, we show that δD0 variations are mainly controlled by mid-tropospheric depletion and rain evaporation in ascending regions, and by sea surface temperature and zorig in subsiding regions. When the air mixing into the SCL is lower in altitude, it is moister, and thus it depletes more efficiently the SCL. In turn, could δD0 measurements help estimate zorig and thus discriminate between different mixing processes? Estimates that are accurate enough to be useful would be difficult to achieve in practice, requiring measuring daily δD profiles, and measuring δD0 with an accuracy of 0.1 ‰ and 0.4 ‰ in trade-wind cumulus and strato-cumulus clouds respectively.

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