Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 9068-8075 |
| Journal | Geophysical research letters |
| Volume | 43 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 2016 |
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Keywords
- METIS-319781
- ITC-ISI-JOURNAL-ARTICLE
- ITC-HYBRID
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SMAP soil moisture drying more rapid than observed in situ following rainfall events. / 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.; van der Velde, Rogier; Walker, Jeffrey P.
In: Geophysical research letters, Vol. 43, No. 15, 2016, p. 9068-8075.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - SMAP soil moisture drying more rapid than observed in situ following rainfall events
AU - Shellito, Peter J.
AU - Small, Eric E.
AU - Colliander, Andreas
AU - Bindlish, Rajat
AU - Cosh, Michael H.
AU - Berg, Aaron A.
AU - Bosch, David D.
AU - Caldwell, Todd G.
AU - Goodrich, David C.
AU - McNairn, Heather
AU - Prueger, John H.
AU - Starks, Patrick J.
AU - van der Velde, Rogier
AU - Walker, Jeffrey P.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
KW - METIS-319781
KW - ITC-ISI-JOURNAL-ARTICLE
KW - ITC-HYBRID
UR - https://ezproxy2.utwente.nl/login?url=https://webapps.itc.utwente.nl/library/2016/isi/vandervelde_sma.pdf
U2 - 10.1002/2016GL069946
DO - 10.1002/2016GL069946
M3 - Article
VL - 43
SP - 9068
EP - 8075
JO - Geophysical research letters
JF - Geophysical research letters
SN - 0094-8276
IS - 15
ER -