The Influence of Convective Aggregation on the Stable Isotopic Composition of Water Vapor
Abstract Remote sensing datasets of water vapor isotopic composition are used along with objective measures of convective aggregation to better understand the impact of convective aggregation on the atmospheric hydrologic cycle in the global tropics (30°N to 30°S) for the period 2015–2020. When conv...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-10-01
|
| Series: | AGU Advances |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2023AV000877 |
| _version_ | 1827783112121122816 |
|---|---|
| author | Joseph Galewsky Matthias Schneider Christopher Diekmann Addisu Semie Sandrine Bony Camille Risi Kerry Emanuel Helene Brogniez |
| author_facet | Joseph Galewsky Matthias Schneider Christopher Diekmann Addisu Semie Sandrine Bony Camille Risi Kerry Emanuel Helene Brogniez |
| author_sort | Joseph Galewsky |
| collection | DOAJ |
| description | Abstract Remote sensing datasets of water vapor isotopic composition are used along with objective measures of convective aggregation to better understand the impact of convective aggregation on the atmospheric hydrologic cycle in the global tropics (30°N to 30°S) for the period 2015–2020. When convection is unaggregated, vertical velocity profiles are top‐heavy, mixing ratios increase and water vapor δD decreases as the mean precipitation rate increases, consistent with partial hydrometeor evaporation below anvils into a relatively humid atmospheric column. Aggregated convection is associated with bottom‐heavy vertical velocity profiles and a positive correlation between mixing ratio and δD, a result that is consistent with isotopic enrichment from detrainment of shallow convection near the observation level. Intermediate degrees of aggregation do not display significant variation in δD with mixing ratio or precipitation rate. Convective aggregation provides a useful paradigm for understanding the relationships between mixing ratio and isotopic composition across a range of convective settings. The results presented here may have utility for a variety of applications including the interpretation of paleoclimate archives and the evaluation of numerical simulations of convection. |
| first_indexed | 2024-03-11T15:42:12Z |
| format | Article |
| id | doaj.art-6de06c75e3234798bd808813be5640af |
| institution | Directory Open Access Journal |
| issn | 2576-604X |
| language | English |
| last_indexed | 2024-03-11T15:42:12Z |
| publishDate | 2023-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | AGU Advances |
| spelling | doaj.art-6de06c75e3234798bd808813be5640af2023-10-26T11:48:29ZengWileyAGU Advances2576-604X2023-10-0145n/an/a10.1029/2023AV000877The Influence of Convective Aggregation on the Stable Isotopic Composition of Water VaporJoseph Galewsky0Matthias Schneider1Christopher Diekmann2Addisu Semie3Sandrine Bony4Camille Risi5Kerry Emanuel6Helene Brogniez7Department of Earth and Planetary Sciences University of New Mexico Albuquerque NM USAInstitute of Meteorology and Climate Research (IMK‐ASF) Karlsruhe Institute of Technology Karlsruhe GermanyInstitute of Meteorology and Climate Research (IMK‐ASF) Karlsruhe Institute of Technology Karlsruhe GermanyComputational Data Science Program Addis Ababa University Addis Ababa EthiopiaLMD/IPSL Sorbonne University CNRS Paris FranceLMD/IPSL Sorbonne University CNRS Paris FranceLorenz Center Massachusetts Institute of Technology Cambridge MA USALaboratoire Atmosphères Milieux, Observations Spatiales (LATMOS/IPSL, UVSQ Université Paris‐Saclay, Sorbonne Université, CNRS) Guyancourt FranceAbstract Remote sensing datasets of water vapor isotopic composition are used along with objective measures of convective aggregation to better understand the impact of convective aggregation on the atmospheric hydrologic cycle in the global tropics (30°N to 30°S) for the period 2015–2020. When convection is unaggregated, vertical velocity profiles are top‐heavy, mixing ratios increase and water vapor δD decreases as the mean precipitation rate increases, consistent with partial hydrometeor evaporation below anvils into a relatively humid atmospheric column. Aggregated convection is associated with bottom‐heavy vertical velocity profiles and a positive correlation between mixing ratio and δD, a result that is consistent with isotopic enrichment from detrainment of shallow convection near the observation level. Intermediate degrees of aggregation do not display significant variation in δD with mixing ratio or precipitation rate. Convective aggregation provides a useful paradigm for understanding the relationships between mixing ratio and isotopic composition across a range of convective settings. The results presented here may have utility for a variety of applications including the interpretation of paleoclimate archives and the evaluation of numerical simulations of convection.https://doi.org/10.1029/2023AV000877convectionwater vaporisotopesaggregation |
| spellingShingle | Joseph Galewsky Matthias Schneider Christopher Diekmann Addisu Semie Sandrine Bony Camille Risi Kerry Emanuel Helene Brogniez The Influence of Convective Aggregation on the Stable Isotopic Composition of Water Vapor AGU Advances convection water vapor isotopes aggregation |
| title | The Influence of Convective Aggregation on the Stable Isotopic Composition of Water Vapor |
| title_full | The Influence of Convective Aggregation on the Stable Isotopic Composition of Water Vapor |
| title_fullStr | The Influence of Convective Aggregation on the Stable Isotopic Composition of Water Vapor |
| title_full_unstemmed | The Influence of Convective Aggregation on the Stable Isotopic Composition of Water Vapor |
| title_short | The Influence of Convective Aggregation on the Stable Isotopic Composition of Water Vapor |
| title_sort | influence of convective aggregation on the stable isotopic composition of water vapor |
| topic | convection water vapor isotopes aggregation |
| url | https://doi.org/10.1029/2023AV000877 |
| work_keys_str_mv | AT josephgalewsky theinfluenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT matthiasschneider theinfluenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT christopherdiekmann theinfluenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT addisusemie theinfluenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT sandrinebony theinfluenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT camillerisi theinfluenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT kerryemanuel theinfluenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT helenebrogniez theinfluenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT josephgalewsky influenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT matthiasschneider influenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT christopherdiekmann influenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT addisusemie influenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT sandrinebony influenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT camillerisi influenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT kerryemanuel influenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor AT helenebrogniez influenceofconvectiveaggregationonthestableisotopiccompositionofwatervapor |