scholarly journals Observed subseasonal variability of heat flux and the SST response of the tropical Indian Ocean

2016 ◽  
Vol 121 (10) ◽  
pp. 7290-7307 ◽  
Author(s):  
Sindu Raj Parampil ◽  
G. N. Bharathraj ◽  
Matthew Harrison ◽  
Debasis Sengupta
Keyword(s):  
Heat Flux ◽  
Indian Ocean ◽  
Tropical Indian Ocean ◽  
Subseasonal Variability

Dynamics of 2015 positive Indian Ocean Dipole

2019 ◽  
Vol 69 (1) ◽  
pp. 75
Author(s):  
Putri Adia Utari ◽  
Mokhamad Yusup Nur Khakim ◽  
Dedi Setiabudidaya ◽  
Iskhaq Iskandar
Keyword(s):  
Heat Flux ◽  
Indian Ocean ◽  
Indian Ocean Dipole ◽  
Tropical Indian Ocean ◽  
Boreal Summer ◽  
The South ◽  
South Eastern ◽  
Positive Indian Ocean Dipole ◽  
Sst Warming ◽  
Dipole Pattern

Evolution of typical positive Indian Ocean Dipole (pIOD) event was dominated by a significant sea-surface temperature (SST) cooling in the south-eastern tropical Indian Ocean. Interestingly, during the evolution of 2015 pIOD event, the SST in the south-eastern tropical Indian Ocean did not reveal significant cooling, instead anomalous strong SST warming took place in the western tropical Indian Ocean off the East African coast. This anomalous SST warming was associated with a weakening of the Asian summer monsoon. Furthermore, analysis on the mixed layer heat budget demonstrated that the evolution of the 2015 pIOD event could be attributed mainly to the air-sea heat flux. By decomposing the air-sea heat flux, it is found that reduced latent heat loss plays an important role on the SST warming in the western pole and keeping SST warm in the eastern pole. We note that a residual term also may play a role during the initial development of the event. In contrast to the SST pattern, the subsurface temperature revealed a clear positive dipole pattern. Shallow (deep) 20°C isothermal layer in the eastern (western) equatorial Indian Ocean was observed during boreal summer. This robust subsurface dipole pattern indicated that the subsurface ocean response was largely wind driven through the equatorial wave dynamics as previously suggested.

scholarly journals Tropical modulation of East Asia air pollution

2020 ◽  
Author(s):  
Myung-Il Jung ◽  
Seok-Woo Son ◽  
Hyemi Kim ◽  
Deliang Chen
Keyword(s):  
Air Pollution ◽  
Indian Ocean ◽  
East Asia ◽  
Phase 1 ◽  
Primary Source ◽  
Tropical Indian Ocean ◽  
Tropical Convection ◽  
Pm10 Concentration ◽  
Subseasonal Variability ◽  
The Indian Ocean

Abstract Given the high population density and serious air pollution problems, understanding and predicting air pollution in East Asia are of great importance. Here, we show that the day-to-day variability of East Asia air pollution in winter is remotely controlled by the convection over the tropical Indian Ocean and western Pacific, the so-called Madden–Julian oscillation (MJO), through its extratropical teleconnections. In particular, the concentration of particulate matter with aerodynamic diameter less than 10 micron (PM10) becomes significantly high when the tropical convection is suppressed over the Indian Ocean (MJO phases 5–6). In contrast, PM10 concentration becomes significantly low when the convection is enhanced there (MJO phase 1–2). The station-averaged PM10 difference between the two MJO phases reaches up to 47% of the daily PM10 variability, indicating that the MJO is a primary source of wintertime subseasonal variability of East Asia PM10 concentration. We also show that PM10 anomaly typically lags the tropical convection by one to two weeks. This opens a new window of opportunity for subseasonal PM10 prediction in East Asia.

scholarly journals Evaluation of Different Heat Flux Products Over the Tropical Indian Ocean

2020 ◽  
Vol 7 (6) ◽  
Author(s):  
Samir Pokhrel ◽  
Ushnanshu Dutta ◽  
Hasibur Rahaman ◽  
Hemantkumar Chaudhari ◽  
Anupam Hazra ◽  
...  
Keyword(s):  
Heat Flux ◽  
Indian Ocean ◽  
Tropical Indian Ocean

scholarly journals Air–Sea Interaction in Association with Monthly Anomaly Departure over the Western North Pacific and Tropical Indian Ocean during the Spring-to-Summer Transition

2016 ◽  
Vol 29 (6) ◽  
pp. 2095-2108 ◽  
Author(s):  
Wenting Hu ◽  
Renguang Wu
Keyword(s):  
Heat Flux ◽  
Indian Ocean ◽  
Tropical Indian Ocean ◽  
Precipitation Variability ◽  
Precipitation Anomaly ◽  
Shortwave Radiation ◽  
Dominant Term ◽  
Transition Season ◽  
Remote Forcing ◽  
Sst Anomaly

Abstract The study analyzes precipitation variability and related air–sea interaction processes over the South China Sea (SCS) and tropical Indian Ocean (TIO) during the spring-to-summer transition season. It is found that physical processes are very different for the variations of seasonal mean and the monthly departures from the seasonal mean. Corresponding to the seasonal mean anomaly, remote forcing from the equatorial Pacific is a major factor for the precipitation variability with a prominent negative feedback of the atmosphere on the ocean. However, from the viewpoint of the monthly anomaly departure from the seasonal mean, a pronounced local coupled air–sea interaction is detected in both the SCS and TIO that features a sequential process of less rainfall, higher sea surface temperature (SST), more rainfall, and lower SST. The evolution of the SST tendency is well coordinated with that of net surface heat flux in the SCS and TIO. During the transition season, shortwave radiation is a dominant term for the SST change in the SCS, whereas both shortwave radiation and latent heat flux are responsible for the SST change in the TIO. The local air–sea relationship shows an obvious spatiotemporal variation during the transition season. Furthermore, the SST anomaly departure in the TIO (SCS) in April (May) could be considered as an indicator for local precipitation anomaly departure in May (June).

Vertical distribution of bigeye tuna Thunnus obesus in the tropical Indian Ocean

2013 ◽  
Vol 20 (3) ◽  
pp. 660-671 ◽  
Author(s):  
Xuezhong CHEN ◽  
Shenglong YANG ◽  
Yu Zhang ◽  
Wei FAN ◽  
Yumei WU
Keyword(s):  
Indian Ocean ◽  
Vertical Distribution ◽  
Tropical Indian Ocean ◽  
Bigeye Tuna ◽  
Thunnus Obesus
Sign in / Sign up

Export Citation Format

Share Document