RT Journal Article
T1 Characterization of moisture sources for austral seas and relationship with sea ice concentration
A1 Reboita, Michelle Simões
A1 Nieto Muñiz, Raquel Olalla
A1 Rocha, Rosmeri Porfírio da
A1 Rodrigues De Moraes Drumond, Anita
A1 Vázquez Domínguez, Marta
A1 Gimeno Presa, Luis
K1 25 Ciencias de la Tierra y del Espacio
K1 2501 Ciencias de la Atmósfera
K1 2501.06 Dinámica Atmosférica
K1 2502 Climatología
AB In this study, the moisture sources acting over each sea (Weddell, King Haakon VII, East Antarctic, Amundsen-Bellingshausen, and Ross-Amundsen) of the Southern Ocean during 1980–2015 are identified with the FLEXPART Lagrangian model and by using two approaches: backward and forward analyses. Backward analysis provides the moisture sources (positive values of Evaporation minus Precipitation, E − P > 0), while forward analysis identifies the moisture sinks (E − P < 0). The most important moisture sources for the austral seas come from midlatitude storm tracks, reaching a maximum between austral winter and spring. The maximum in moisture sinks, in general, occurs in austral end-summer/autumn. There is a negative correlation (higher with 2-months lagged) between moisture sink and sea ice concentration (SIC), indicating that an increase in the moisture sink can be associated with the decrease in the SIC. This correlation is investigated by focusing on extremes (high and low) of the moisture sink over the Weddell Sea. Periods of high (low) moisture sinks show changes in the atmospheric circulation with a consequent positive (negative) temperature anomaly contributing to decreasing (increasing) the SIC over the Weddell Sea. This study also suggests possible relationships between the positive (negative) phase of the Southern Annular Mode with the increase (decrease) in the moisture that travels from the midlatitude sources to the Weddell Sea.
PB Atmosphere
SN 20734433
YR 2019
FD 2019-10-17
LK http://hdl.handle.net/11093/2124
UL http://hdl.handle.net/11093/2124
LA eng
NO Atmosphere, 10(10): 627 (2019)
NO Fundação de Amparo à Pesquisa do Estado de São Paulo | Ref. 2017/03981-3
DS Investigo
RD 13-dic-2024