Soil Moisture Effects on Afternoon Precipitation Occurrence in Current Climate Models
Abstract Soil moisture‐precipitation feedbacks in a large ensemble of global climate model simulations are evaluated. A set of three metrics are used to assess the sensitivity of afternoon rainfall occurrence to morning soil moisture in terms of their spatial, temporal, and heterogeneity characteris...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-02-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2018GL080879 |
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| _version_ | 1849321407508381696 |
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| author | Heewon Moon Benoit P. Guillod Lukas Gudmundsson Sonia I. Seneviratne |
| author_facet | Heewon Moon Benoit P. Guillod Lukas Gudmundsson Sonia I. Seneviratne |
| author_sort | Heewon Moon |
| collection | DOAJ |
| description | Abstract Soil moisture‐precipitation feedbacks in a large ensemble of global climate model simulations are evaluated. A set of three metrics are used to assess the sensitivity of afternoon rainfall occurrence to morning soil moisture in terms of their spatial, temporal, and heterogeneity characteristics. Positive (negative) spatial feedback indicates that the afternoon rainfall occurs more frequently over wetter (drier) land surface than its surroundings. Positive (negative) temporal feedback indicates preference over temporally wetter (drier) conditions, and positive (negative) heterogeneity feedback indicates preference over more spatially heterogeneous (homogeneous) soil moisture conditions. We confirm previous results highlighting a dominantly positive spatial feedback in the models as opposed to observations. On average, models tend to agree better with observations for temporal and heterogeneity feedback characteristics, although intermodel variability is largest for these metrics. The collective influence of the three feedbacks suggests that they may lead to more localized precipitation persistence in models than in observations. |
| format | Article |
| id | doaj-art-e7cf6f7d0c7c48a68ff5a5d9e1d6759c |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2019-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-e7cf6f7d0c7c48a68ff5a5d9e1d6759c2025-08-20T03:49:45ZengWileyGeophysical Research Letters0094-82761944-80072019-02-014631861186910.1029/2018GL080879Soil Moisture Effects on Afternoon Precipitation Occurrence in Current Climate ModelsHeewon Moon0Benoit P. Guillod1Lukas Gudmundsson2Sonia I. Seneviratne3Institute for Atmospheric and Climate Science ETH Zurich Zurich SwitzerlandInstitute for Atmospheric and Climate Science ETH Zurich Zurich SwitzerlandInstitute for Atmospheric and Climate Science ETH Zurich Zurich SwitzerlandInstitute for Atmospheric and Climate Science ETH Zurich Zurich SwitzerlandAbstract Soil moisture‐precipitation feedbacks in a large ensemble of global climate model simulations are evaluated. A set of three metrics are used to assess the sensitivity of afternoon rainfall occurrence to morning soil moisture in terms of their spatial, temporal, and heterogeneity characteristics. Positive (negative) spatial feedback indicates that the afternoon rainfall occurs more frequently over wetter (drier) land surface than its surroundings. Positive (negative) temporal feedback indicates preference over temporally wetter (drier) conditions, and positive (negative) heterogeneity feedback indicates preference over more spatially heterogeneous (homogeneous) soil moisture conditions. We confirm previous results highlighting a dominantly positive spatial feedback in the models as opposed to observations. On average, models tend to agree better with observations for temporal and heterogeneity feedback characteristics, although intermodel variability is largest for these metrics. The collective influence of the three feedbacks suggests that they may lead to more localized precipitation persistence in models than in observations.https://doi.org/10.1029/2018GL080879soil moisture‐precipitation feedbackglobal climate modelssubdaily precipitation |
| spellingShingle | Heewon Moon Benoit P. Guillod Lukas Gudmundsson Sonia I. Seneviratne Soil Moisture Effects on Afternoon Precipitation Occurrence in Current Climate Models Geophysical Research Letters soil moisture‐precipitation feedback global climate models subdaily precipitation |
| title | Soil Moisture Effects on Afternoon Precipitation Occurrence in Current Climate Models |
| title_full | Soil Moisture Effects on Afternoon Precipitation Occurrence in Current Climate Models |
| title_fullStr | Soil Moisture Effects on Afternoon Precipitation Occurrence in Current Climate Models |
| title_full_unstemmed | Soil Moisture Effects on Afternoon Precipitation Occurrence in Current Climate Models |
| title_short | Soil Moisture Effects on Afternoon Precipitation Occurrence in Current Climate Models |
| title_sort | soil moisture effects on afternoon precipitation occurrence in current climate models |
| topic | soil moisture‐precipitation feedback global climate models subdaily precipitation |
| url | https://doi.org/10.1029/2018GL080879 |
| work_keys_str_mv | AT heewonmoon soilmoistureeffectsonafternoonprecipitationoccurrenceincurrentclimatemodels AT benoitpguillod soilmoistureeffectsonafternoonprecipitationoccurrenceincurrentclimatemodels AT lukasgudmundsson soilmoistureeffectsonafternoonprecipitationoccurrenceincurrentclimatemodels AT soniaiseneviratne soilmoistureeffectsonafternoonprecipitationoccurrenceincurrentclimatemodels |