Biotic pump of atmospheric moisture as driver of the hydrological cycle on land
In this paper the basic geophysical and ecological principles are jointly analyzed that allow the landmasses of Earth to remain moistened sufficiently for terrestrial life to be possible. 1. Under gravity, land inevitably loses water to the ocean. To keep land moistened, the gravitational water runo...
Published in: | Hydrology and Earth System Sciences |
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Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2007
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00032566 2023-05-15T18:45:46+02:00 Biotic pump of atmospheric moisture as driver of the hydrological cycle on land Makarieva, A. M. Gorshkov, V. G. 2007-03 electronic https://doi.org/10.5194/hess-11-1013-2007 https://noa.gwlb.de/receive/cop_mods_00032566 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032520/hess-11-1013-2007.pdf https://hess.copernicus.org/articles/11/1013/2007/hess-11-1013-2007.pdf eng eng Copernicus Publications Hydrology and Earth System Sciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2100610 -- http://www.hydrol-earth-syst-sci.net/volumes_and_issues.html -- 1607-7938 https://doi.org/10.5194/hess-11-1013-2007 https://noa.gwlb.de/receive/cop_mods_00032566 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032520/hess-11-1013-2007.pdf https://hess.copernicus.org/articles/11/1013/2007/hess-11-1013-2007.pdf https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2007 ftnonlinearchiv https://doi.org/10.5194/hess-11-1013-2007 2022-02-08T22:46:11Z In this paper the basic geophysical and ecological principles are jointly analyzed that allow the landmasses of Earth to remain moistened sufficiently for terrestrial life to be possible. 1. Under gravity, land inevitably loses water to the ocean. To keep land moistened, the gravitational water runoff must be continuously compensated by the atmospheric ocean-to-land moisture transport. Using data for five terrestrial transects of the International Geosphere Biosphere Program we show that the mean distance to which air fluxes can transport moisture over non-forested areas, does not exceed several hundred kilometers; precipitation decreases exponentially with distance from the ocean. 2. In contrast, precipitation over extensive natural forests does not depend on the distance from the ocean along several thousand kilometers, as illustrated for the Amazon and Yenisey river basins and Equatorial Africa. This points to the existence of an active biotic pump transporting atmospheric moisture inland from the ocean. 3. Physical principles of the biotic moisture pump are investigated based on the previously unstudied properties of atmospheric water vapor, which can be either in or out of aerostatic equilibrium depending on the lapse rate of air temperature. A novel physical principle is formulated according to which the low-level air moves from areas with weak evaporation to areas with more intensive evaporation. Due to the high leaf area index, natural forests maintain high evaporation fluxes, which support the ascending air motion over the forest and "suck in" moist air from the ocean, which is the essence of the biotic pump of atmospheric moisture. In the result, the gravitational runoff water losses from the optimally moistened forest soil can be fully compensated by the biotically enhanced precipitation at any distance from the ocean. 4. It is discussed how a continent-scale biotic water pump mechanism could be produced by natural selection acting on individual trees. 5. Replacement of the natural forest cover by a low leaf index vegetation leads to an up to tenfold reduction in the mean continental precipitation and runoff, in contrast to the previously available estimates made without accounting for the biotic moisture pump. The analyzed body of evidence testifies that the long-term stability of an intense terrestrial water cycle is unachievable without the recovery of natural, self-sustaining forests on continent-wide areas. Article in Journal/Newspaper yenisey river Niedersächsisches Online-Archiv NOA Yenisey ENVELOPE(82.680,82.680,71.828,71.828) Hydrology and Earth System Sciences 11 2 1013 1033 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Makarieva, A. M. Gorshkov, V. G. Biotic pump of atmospheric moisture as driver of the hydrological cycle on land |
topic_facet |
article Verlagsveröffentlichung |
description |
In this paper the basic geophysical and ecological principles are jointly analyzed that allow the landmasses of Earth to remain moistened sufficiently for terrestrial life to be possible. 1. Under gravity, land inevitably loses water to the ocean. To keep land moistened, the gravitational water runoff must be continuously compensated by the atmospheric ocean-to-land moisture transport. Using data for five terrestrial transects of the International Geosphere Biosphere Program we show that the mean distance to which air fluxes can transport moisture over non-forested areas, does not exceed several hundred kilometers; precipitation decreases exponentially with distance from the ocean. 2. In contrast, precipitation over extensive natural forests does not depend on the distance from the ocean along several thousand kilometers, as illustrated for the Amazon and Yenisey river basins and Equatorial Africa. This points to the existence of an active biotic pump transporting atmospheric moisture inland from the ocean. 3. Physical principles of the biotic moisture pump are investigated based on the previously unstudied properties of atmospheric water vapor, which can be either in or out of aerostatic equilibrium depending on the lapse rate of air temperature. A novel physical principle is formulated according to which the low-level air moves from areas with weak evaporation to areas with more intensive evaporation. Due to the high leaf area index, natural forests maintain high evaporation fluxes, which support the ascending air motion over the forest and "suck in" moist air from the ocean, which is the essence of the biotic pump of atmospheric moisture. In the result, the gravitational runoff water losses from the optimally moistened forest soil can be fully compensated by the biotically enhanced precipitation at any distance from the ocean. 4. It is discussed how a continent-scale biotic water pump mechanism could be produced by natural selection acting on individual trees. 5. Replacement of the natural forest cover by a low leaf index vegetation leads to an up to tenfold reduction in the mean continental precipitation and runoff, in contrast to the previously available estimates made without accounting for the biotic moisture pump. The analyzed body of evidence testifies that the long-term stability of an intense terrestrial water cycle is unachievable without the recovery of natural, self-sustaining forests on continent-wide areas. |
format |
Article in Journal/Newspaper |
author |
Makarieva, A. M. Gorshkov, V. G. |
author_facet |
Makarieva, A. M. Gorshkov, V. G. |
author_sort |
Makarieva, A. M. |
title |
Biotic pump of atmospheric moisture as driver of the hydrological cycle on land |
title_short |
Biotic pump of atmospheric moisture as driver of the hydrological cycle on land |
title_full |
Biotic pump of atmospheric moisture as driver of the hydrological cycle on land |
title_fullStr |
Biotic pump of atmospheric moisture as driver of the hydrological cycle on land |
title_full_unstemmed |
Biotic pump of atmospheric moisture as driver of the hydrological cycle on land |
title_sort |
biotic pump of atmospheric moisture as driver of the hydrological cycle on land |
publisher |
Copernicus Publications |
publishDate |
2007 |
url |
https://doi.org/10.5194/hess-11-1013-2007 https://noa.gwlb.de/receive/cop_mods_00032566 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032520/hess-11-1013-2007.pdf https://hess.copernicus.org/articles/11/1013/2007/hess-11-1013-2007.pdf |
long_lat |
ENVELOPE(82.680,82.680,71.828,71.828) |
geographic |
Yenisey |
geographic_facet |
Yenisey |
genre |
yenisey river |
genre_facet |
yenisey river |
op_relation |
Hydrology and Earth System Sciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2100610 -- http://www.hydrol-earth-syst-sci.net/volumes_and_issues.html -- 1607-7938 https://doi.org/10.5194/hess-11-1013-2007 https://noa.gwlb.de/receive/cop_mods_00032566 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032520/hess-11-1013-2007.pdf https://hess.copernicus.org/articles/11/1013/2007/hess-11-1013-2007.pdf |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/hess-11-1013-2007 |
container_title |
Hydrology and Earth System Sciences |
container_volume |
11 |
container_issue |
2 |
container_start_page |
1013 |
op_container_end_page |
1033 |
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1766236911081357312 |