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SMAP soil moisture drying more rapid than observed in situ following rainfall events
We examine soil drying rates by comparing surface soil moisture observations from the NASA Soil Moisture Active Passive (SMAP) mission to those from networks of in situ probes upscaled to SMAP's sensing footprint. SMAP and upscaled in situ probes record different soil drying dynamics after rain...
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| Published in: | Geophysical research letters 2016-08, Vol.43 (15), p.8068-8075 |
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| Main Authors: | , , , , , , , , , , , , , |
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| Language: | English |
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| cites | cdi_FETCH-LOGICAL-a4612-ae5891b34774eb3e05a5d2132563e4b5d2d5eafd42f9144f44ed464eb2d700ce3 |
| container_end_page | 8075 |
| container_issue | 15 |
| container_start_page | 8068 |
| container_title | Geophysical research letters |
| container_volume | 43 |
| creator | Shellito, Peter J. Small, Eric E. Colliander, Andreas Bindlish, Rajat Cosh, Michael H. Berg, Aaron A. Bosch, David D. Caldwell, Todd G. Goodrich, David C. McNairn, Heather Prueger, John H. Starks, Patrick J. Velde, Rogier Walker, Jeffrey P. |
| description | We examine soil drying rates by comparing surface soil moisture observations from the NASA Soil Moisture Active Passive (SMAP) mission to those from networks of in situ probes upscaled to SMAP's sensing footprint. SMAP and upscaled in situ probes record different soil drying dynamics after rainfall. We modeled this process by fitting an exponential curve to 63 drydown events: the median SMAP drying timescale is 44% shorter and the magnitude of drying is 35% greater than in situ measurements. We also calculated drying rates between consecutive observations from 193 events. For 6 days after rainfall, soil moisture from SMAP dries at twice the rate of in situ measurements. Restricting in situ observations to times of SMAP observations does not change the drying timescale, magnitude, or rate. Therefore, observed differences are likely due to differences in sensing depths: SMAP measures shallower soil moisture than in situ probes, especially after rainfall.
Key Points
SMAP and networks of in situ probes observe soil drying after rainfall
SMAP observes soil drying to occur over a 44% shorter timescale than in situ
SMAP observes soil drying to occur at twice the rate as in situ |
| doi_str_mv | 10.1002/2016GL069946 |
| format | article |
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Key Points
SMAP and networks of in situ probes observe soil drying after rainfall
SMAP observes soil drying to occur over a 44% shorter timescale than in situ
SMAP observes soil drying to occur at twice the rate as in situ</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/2016GL069946</identifier><language>eng</language><publisher>Washington: John Wiley & Sons, Inc</publisher><subject>Curve fitting ; Detection ; drydown ; Drying ; Dynamics ; Herbivores ; In situ measurement ; in situ monitoring ; Mathematical models ; Moisture ; Networks ; Probes ; Rain ; Rainfall ; Sensors ; Soil ; Soil (material) ; Soil drying ; Soil dynamics ; Soil moisture ; Soil Moisture Active Passive (SMAP) ; Soil surfaces ; Soils ; Time ; validation</subject><ispartof>Geophysical research letters, 2016-08, Vol.43 (15), p.8068-8075</ispartof><rights>2016. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4612-ae5891b34774eb3e05a5d2132563e4b5d2d5eafd42f9144f44ed464eb2d700ce3</citedby><cites>FETCH-LOGICAL-a4612-ae5891b34774eb3e05a5d2132563e4b5d2d5eafd42f9144f44ed464eb2d700ce3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2F2016GL069946$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2016GL069946$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,11495,27903,27904,46446,46870</link.rule.ids></links><search><creatorcontrib>Shellito, Peter J.</creatorcontrib><creatorcontrib>Small, Eric E.</creatorcontrib><creatorcontrib>Colliander, Andreas</creatorcontrib><creatorcontrib>Bindlish, Rajat</creatorcontrib><creatorcontrib>Cosh, Michael H.</creatorcontrib><creatorcontrib>Berg, Aaron A.</creatorcontrib><creatorcontrib>Bosch, David D.</creatorcontrib><creatorcontrib>Caldwell, Todd G.</creatorcontrib><creatorcontrib>Goodrich, David C.</creatorcontrib><creatorcontrib>McNairn, Heather</creatorcontrib><creatorcontrib>Prueger, John H.</creatorcontrib><creatorcontrib>Starks, Patrick J.</creatorcontrib><creatorcontrib>Velde, Rogier</creatorcontrib><creatorcontrib>Walker, Jeffrey P.</creatorcontrib><title>SMAP soil moisture drying more rapid than observed in situ following rainfall events</title><title>Geophysical research letters</title><description>We examine soil drying rates by comparing surface soil moisture observations from the NASA Soil Moisture Active Passive (SMAP) mission to those from networks of in situ probes upscaled to SMAP's sensing footprint. SMAP and upscaled in situ probes record different soil drying dynamics after rainfall. We modeled this process by fitting an exponential curve to 63 drydown events: the median SMAP drying timescale is 44% shorter and the magnitude of drying is 35% greater than in situ measurements. We also calculated drying rates between consecutive observations from 193 events. For 6 days after rainfall, soil moisture from SMAP dries at twice the rate of in situ measurements. Restricting in situ observations to times of SMAP observations does not change the drying timescale, magnitude, or rate. Therefore, observed differences are likely due to differences in sensing depths: SMAP measures shallower soil moisture than in situ probes, especially after rainfall.
Key Points
SMAP and networks of in situ probes observe soil drying after rainfall
SMAP observes soil drying to occur over a 44% shorter timescale than in situ
SMAP observes soil drying to occur at twice the rate as in situ</description><subject>Curve fitting</subject><subject>Detection</subject><subject>drydown</subject><subject>Drying</subject><subject>Dynamics</subject><subject>Herbivores</subject><subject>In situ measurement</subject><subject>in situ monitoring</subject><subject>Mathematical models</subject><subject>Moisture</subject><subject>Networks</subject><subject>Probes</subject><subject>Rain</subject><subject>Rainfall</subject><subject>Sensors</subject><subject>Soil</subject><subject>Soil (material)</subject><subject>Soil drying</subject><subject>Soil dynamics</subject><subject>Soil moisture</subject><subject>Soil Moisture Active Passive (SMAP)</subject><subject>Soil surfaces</subject><subject>Soils</subject><subject>Time</subject><subject>validation</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqN0U1LAzEQBuAgCtbqzR8Q8OLB6uRzN8dStAoVRet5SbuzmrLd1GS3pf_elHoQD-Jp3oGHgZkh5JzBNQPgNxyYHk9AGyP1AekxI-UgB8gOSQ_ApMwzfUxOYlwAgADBemT6-jh8ptG7mi69i20XkJZh65r31Kcc7MqVtP2wDfWziGGNJXUNja7taOXr2m92NFjXVLauKa6xaeMpOUpdxLPv2idvd7fT0f1g8jR-GA0nAys14wOLKjdsJmSWSZwJBGVVyZngSguUs5RLhbYqJa8Mk7KSEkupE-VlBjBH0SeX-7mr4D87jG2xdHGOdW0b9F0sWC6U0lIo8w_KDBPaqDzRi1904bvQpEUKZmB3W27UnypnIjfAtUjqaq_mwccYsCpWwS1t2BYMit3Pip8_S5zv-cbVuP3TFuOXiZI5cPEFr7yVag</recordid><startdate>20160816</startdate><enddate>20160816</enddate><creator>Shellito, Peter J.</creator><creator>Small, Eric E.</creator><creator>Colliander, Andreas</creator><creator>Bindlish, Rajat</creator><creator>Cosh, Michael H.</creator><creator>Berg, Aaron A.</creator><creator>Bosch, David D.</creator><creator>Caldwell, Todd G.</creator><creator>Goodrich, David C.</creator><creator>McNairn, Heather</creator><creator>Prueger, John H.</creator><creator>Starks, Patrick J.</creator><creator>Velde, Rogier</creator><creator>Walker, Jeffrey P.</creator><general>John Wiley & Sons, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>8FD</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope></search><sort><creationdate>20160816</creationdate><title>SMAP soil moisture drying more rapid than observed in situ following rainfall events</title><author>Shellito, Peter J. ; Small, Eric E. ; Colliander, Andreas ; Bindlish, Rajat ; Cosh, Michael H. ; Berg, Aaron A. ; Bosch, David D. ; Caldwell, Todd G. ; Goodrich, David C. ; McNairn, Heather ; Prueger, John H. ; Starks, Patrick J. ; Velde, Rogier ; Walker, Jeffrey P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4612-ae5891b34774eb3e05a5d2132563e4b5d2d5eafd42f9144f44ed464eb2d700ce3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Curve fitting</topic><topic>Detection</topic><topic>drydown</topic><topic>Drying</topic><topic>Dynamics</topic><topic>Herbivores</topic><topic>In situ measurement</topic><topic>in situ monitoring</topic><topic>Mathematical models</topic><topic>Moisture</topic><topic>Networks</topic><topic>Probes</topic><topic>Rain</topic><topic>Rainfall</topic><topic>Sensors</topic><topic>Soil</topic><topic>Soil (material)</topic><topic>Soil drying</topic><topic>Soil dynamics</topic><topic>Soil moisture</topic><topic>Soil Moisture Active Passive (SMAP)</topic><topic>Soil surfaces</topic><topic>Soils</topic><topic>Time</topic><topic>validation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shellito, Peter J.</creatorcontrib><creatorcontrib>Small, Eric E.</creatorcontrib><creatorcontrib>Colliander, Andreas</creatorcontrib><creatorcontrib>Bindlish, Rajat</creatorcontrib><creatorcontrib>Cosh, Michael H.</creatorcontrib><creatorcontrib>Berg, Aaron A.</creatorcontrib><creatorcontrib>Bosch, David D.</creatorcontrib><creatorcontrib>Caldwell, Todd G.</creatorcontrib><creatorcontrib>Goodrich, David C.</creatorcontrib><creatorcontrib>McNairn, Heather</creatorcontrib><creatorcontrib>Prueger, John H.</creatorcontrib><creatorcontrib>Starks, Patrick J.</creatorcontrib><creatorcontrib>Velde, Rogier</creatorcontrib><creatorcontrib>Walker, Jeffrey P.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Technology Research Database</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shellito, Peter J.</au><au>Small, Eric E.</au><au>Colliander, Andreas</au><au>Bindlish, Rajat</au><au>Cosh, Michael H.</au><au>Berg, Aaron A.</au><au>Bosch, David D.</au><au>Caldwell, Todd G.</au><au>Goodrich, David C.</au><au>McNairn, Heather</au><au>Prueger, John H.</au><au>Starks, Patrick J.</au><au>Velde, Rogier</au><au>Walker, Jeffrey P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>SMAP soil moisture drying more rapid than observed in situ following rainfall events</atitle><jtitle>Geophysical research letters</jtitle><date>2016-08-16</date><risdate>2016</risdate><volume>43</volume><issue>15</issue><spage>8068</spage><epage>8075</epage><pages>8068-8075</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>We examine soil drying rates by comparing surface soil moisture observations from the NASA Soil Moisture Active Passive (SMAP) mission to those from networks of in situ probes upscaled to SMAP's sensing footprint. SMAP and upscaled in situ probes record different soil drying dynamics after rainfall. We modeled this process by fitting an exponential curve to 63 drydown events: the median SMAP drying timescale is 44% shorter and the magnitude of drying is 35% greater than in situ measurements. We also calculated drying rates between consecutive observations from 193 events. For 6 days after rainfall, soil moisture from SMAP dries at twice the rate of in situ measurements. Restricting in situ observations to times of SMAP observations does not change the drying timescale, magnitude, or rate. Therefore, observed differences are likely due to differences in sensing depths: SMAP measures shallower soil moisture than in situ probes, especially after rainfall.
Key Points
SMAP and networks of in situ probes observe soil drying after rainfall
SMAP observes soil drying to occur over a 44% shorter timescale than in situ
SMAP observes soil drying to occur at twice the rate as in situ</abstract><cop>Washington</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/2016GL069946</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0094-8276 |
| ispartof | Geophysical research letters, 2016-08, Vol.43 (15), p.8068-8075 |
| issn | 0094-8276 1944-8007 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1835564359 |
| source | Wiley-Blackwell AGU Digital Archive |
| subjects | Curve fitting Detection drydown Drying Dynamics Herbivores In situ measurement in situ monitoring Mathematical models Moisture Networks Probes Rain Rainfall Sensors Soil Soil (material) Soil drying Soil dynamics Soil moisture Soil Moisture Active Passive (SMAP) Soil surfaces Soils Time validation |
| title | SMAP soil moisture drying more rapid than observed in situ following rainfall events |
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