A correlated shortening of the North and South American monsoon seasons in the past few decades

Verfasser / Beitragende:
[Paola Arias, Rong Fu, Carolina Vera, Maisa Rojas]
Ort, Verlag, Jahr:
2015
Enthalten in:
Climate Dynamics, 45/11-12(2015-12-01), 3183-3203
Format:
Artikel (online)
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024 7 0 |a 10.1007/s00382-015-2533-1  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s00382-015-2533-1 
245 0 2 |a A correlated shortening of the North and South American monsoon seasons in the past few decades  |h [Elektronische Daten]  |c [Paola Arias, Rong Fu, Carolina Vera, Maisa Rojas] 
520 3 |a Our observational analysis shows that the wet seasons of the American monsoon systems have shortened since 1978 due to correlated earlier retreats of the North American monsoon (NAM) and late onsets of the southern Amazon wet season, an important part of the South American monsoon (SAM). These changes are related to the combination of the global sea surface temperature (SST) warming mode, the El Niño-Southern Oscillation (ENSO), the Atlantic Multidecadal Oscillation (AMO), the westward shift of the North Atlantic subtropical high (NASH), and the enhancement of Pacific South American and Pacific North American wave train patterns, which induces variations of the regional circulation at interannual and decadal scales. The joint contributions from these forcing factors are associated with a stronger and more equatorward regional Hadley cell, which enhances convergence towards the equator, strengthening and possibly delaying the retreat of the tropical part of the NAM. This in turn accelerates the demise of the northern NAM and delays the reversal of the cross-equatorial flow over South America, reducing moisture transport to the SAM and delaying its onset. In addition, the thermodynamic response to warming appears to cause local drier land conditions over both regions, reinforcing the observed changes in these monsoons. Although previous studies have identified the isolated influence of the regional Hadley cell, ENSO, AMO, global SST warming, and NASH on the NAM, the correlated changes between NAM and SAM through variations of the cross-equatorial flow had not been established before. 
540 |a Springer-Verlag Berlin Heidelberg, 2015 
690 7 |a Southern Amazon wet season  |2 nationallicence 
690 7 |a North American monsoon  |2 nationallicence 
690 7 |a South American monsoon  |2 nationallicence 
690 7 |a North Atlantic subtropical high  |2 nationallicence 
690 7 |a Cross-equatorial flow  |2 nationallicence 
690 7 |a Global warming  |2 nationallicence 
700 1 |a Arias  |D Paola  |u Grupo de Ingeniería y Gestión Ambiental (GIGA), Escuela Ambiental, Facultad de Ingeniería, Universidad de Antioquia, Calle 67 # 53-108, Bloque 20, Oficina 441, A. A. 1226, Medellín, Colombia  |4 aut 
700 1 |a Fu  |D Rong  |u Department of Geological Sciences, The University of Texas at Austin, Austin, TX, USA  |4 aut 
700 1 |a Vera  |D Carolina  |u Centro de Investigaciones del Mar y la Atmósfera, CONICET-UBA, DCAO/FCEN, UMI, IFAECI/CNRS, Buenos Aires, Argentina  |4 aut 
700 1 |a Rojas  |D Maisa  |u Departamento de Geofísica, Universidad de Chile, Santiago, Chile  |4 aut 
773 0 |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 45/11-12(2015-12-01), 3183-3203  |x 0930-7575  |q 45:11-12<3183  |1 2015  |2 45  |o 382 
856 4 0 |u https://doi.org/10.1007/s00382-015-2533-1  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s00382-015-2533-1  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Arias  |D Paola  |u Grupo de Ingeniería y Gestión Ambiental (GIGA), Escuela Ambiental, Facultad de Ingeniería, Universidad de Antioquia, Calle 67 # 53-108, Bloque 20, Oficina 441, A. A. 1226, Medellín, Colombia  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Fu  |D Rong  |u Department of Geological Sciences, The University of Texas at Austin, Austin, TX, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Vera  |D Carolina  |u Centro de Investigaciones del Mar y la Atmósfera, CONICET-UBA, DCAO/FCEN, UMI, IFAECI/CNRS, Buenos Aires, Argentina  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Rojas  |D Maisa  |u Departamento de Geofísica, Universidad de Chile, Santiago, Chile  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 45/11-12(2015-12-01), 3183-3203  |x 0930-7575  |q 45:11-12<3183  |1 2015  |2 45  |o 382