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231225s2017 xx |||||o 00| ||eng c |
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|a 10.1002/2017JD027523
|2 doi
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|a eng
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| 100 |
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|a Williams, A Park
|e verfasserin
|4 aut
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4 |
|a The 2016 southeastern US drought
|b an extreme departure from centennial wetting and cooling
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 14.03.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The fall 2016 drought in the southeastern United States (SE US) appeared exceptional based on its widespread impacts, but the current monitoring framework that only extends from 1979-present does not readily facilitate evaluation of soil-moisture anomalies in a centennial context. A new method to extend monthly gridded soil-moisture estimates back to 1895 is developed, indicating that since 1895, October-November 2016 soil moisture (0-200 cm) in the SE US was likely the second lowest on record, behind 1954. This severe drought developed rapidly and was brought on by low September-November precipitation and record-high September-November daily maximum temperatures (Tmax). Record Tmax drove record-high atmospheric moisture demand, accounting for 28% of the October-November 2016 soil-moisture anomaly. Drought and heat in fall 2016 contrasted with 20th-century wetting and cooling in the region, but resembled conditions more common from 1895-1956. Dynamically, the exceptional drying in fall 2016 was driven by anomalous ridging over the central United States that reduced south-southwesterly moisture transports into the SE US by approximately 75%. These circulation anomalies were likely promoted by a moderate La Niña and warmth in the tropical Atlantic, but these processes accounted for very little of the SE US drying in fall 2016, implying a large role for internal atmospheric variability. The extended analysis back to 1895 indicates that SE US droughts as strong as the 2016 event are more likely than indicated from a shorter 60-year perspective, and continued multi-decadal swings in precipitation may combine with future warming to further enhance the likelihood of such events
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|a Journal Article
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|a Cook, Benjamin I
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Smerdon, Jason E
|e verfasserin
|4 aut
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| 700 |
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|a Bishop, Daniel A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Seager, Richard
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mankin, Justin S
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of geophysical research. Atmospheres : JGR
|d 1998
|g 122(2017), 20 vom: 27. Okt., Seite 10888-10905
|w (DE-627)NLM098183494
|x 2169-897X
|7 nnns
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| 773 |
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|g volume:122
|g year:2017
|g number:20
|g day:27
|g month:10
|g pages:10888-10905
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| 856 |
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|u http://dx.doi.org/10.1002/2017JD027523
|3 Volltext
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