Drought Spatial Extent and Dependence Increase During Drought Propagation From the Atmosphere to the Hydrosphere
Abstract As droughts propagate both in time and space, their impacts increase because of changes in drought properties. Because temporal and spatial drought propagation are mostly studied separately, it is yet unknown how drought spatial extent and connectedness change as droughts propagate though t...
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| Format: | Article |
| Language: | English |
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Wiley
2024-03-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2023GL107918 |
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| author | Manuela I. Brunner Corentin Chartier‐Rescan |
| author_facet | Manuela I. Brunner Corentin Chartier‐Rescan |
| author_sort | Manuela I. Brunner |
| collection | DOAJ |
| description | Abstract As droughts propagate both in time and space, their impacts increase because of changes in drought properties. Because temporal and spatial drought propagation are mostly studied separately, it is yet unknown how drought spatial extent and connectedness change as droughts propagate though the hydrological cycle from precipitation to streamflow and groundwater. Here, we use a large‐sample dataset of 70 catchments in Central Europe to study the propagation of local and spatial drought characteristics. We show that drought propagation leads to longer, later, and fewer droughts with larger spatial extents. 75% of the precipitation droughts propagate to P‐ET, among these 20% propagate further to streamflow and 10% to groundwater. Of the streamflow droughts, 40% propagate to groundwater. Drought extent and dependence increase during drought propagation along the drought propagation pathway from precipitation to streamflow thanks to synchronizing effects of the land‐surface but decreases again for groundwater because of sub‐surface heterogeneity. |
| format | Article |
| id | doaj-art-4d1e0c893df54a4f82c6d5cd8aa449ea |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-4d1e0c893df54a4f82c6d5cd8aa449ea2025-08-20T01:51:57ZengWileyGeophysical Research Letters0094-82761944-80072024-03-01516n/an/a10.1029/2023GL107918Drought Spatial Extent and Dependence Increase During Drought Propagation From the Atmosphere to the HydrosphereManuela I. Brunner0Corentin Chartier‐Rescan1Institute for Atmospheric and Climate Science ETH Zurich Zurich SwitzerlandInstitute for Atmospheric and Climate Science ETH Zurich Zurich SwitzerlandAbstract As droughts propagate both in time and space, their impacts increase because of changes in drought properties. Because temporal and spatial drought propagation are mostly studied separately, it is yet unknown how drought spatial extent and connectedness change as droughts propagate though the hydrological cycle from precipitation to streamflow and groundwater. Here, we use a large‐sample dataset of 70 catchments in Central Europe to study the propagation of local and spatial drought characteristics. We show that drought propagation leads to longer, later, and fewer droughts with larger spatial extents. 75% of the precipitation droughts propagate to P‐ET, among these 20% propagate further to streamflow and 10% to groundwater. Of the streamflow droughts, 40% propagate to groundwater. Drought extent and dependence increase during drought propagation along the drought propagation pathway from precipitation to streamflow thanks to synchronizing effects of the land‐surface but decreases again for groundwater because of sub‐surface heterogeneity.https://doi.org/10.1029/2023GL107918droughtdrought propagationspatial extentAlpsmeteorological droughthydrological drought |
| spellingShingle | Manuela I. Brunner Corentin Chartier‐Rescan Drought Spatial Extent and Dependence Increase During Drought Propagation From the Atmosphere to the Hydrosphere Geophysical Research Letters drought drought propagation spatial extent Alps meteorological drought hydrological drought |
| title | Drought Spatial Extent and Dependence Increase During Drought Propagation From the Atmosphere to the Hydrosphere |
| title_full | Drought Spatial Extent and Dependence Increase During Drought Propagation From the Atmosphere to the Hydrosphere |
| title_fullStr | Drought Spatial Extent and Dependence Increase During Drought Propagation From the Atmosphere to the Hydrosphere |
| title_full_unstemmed | Drought Spatial Extent and Dependence Increase During Drought Propagation From the Atmosphere to the Hydrosphere |
| title_short | Drought Spatial Extent and Dependence Increase During Drought Propagation From the Atmosphere to the Hydrosphere |
| title_sort | drought spatial extent and dependence increase during drought propagation from the atmosphere to the hydrosphere |
| topic | drought drought propagation spatial extent Alps meteorological drought hydrological drought |
| url | https://doi.org/10.1029/2023GL107918 |
| work_keys_str_mv | AT manuelaibrunner droughtspatialextentanddependenceincreaseduringdroughtpropagationfromtheatmospheretothehydrosphere AT corentinchartierrescan droughtspatialextentanddependenceincreaseduringdroughtpropagationfromtheatmospheretothehydrosphere |