scholarly journals Interannual variability of sea surface height difference between western Pacific Ocean and eastern Indian Ocean and its effect to geostrophic current in Lombok Strait

2018 ◽  
Vol 162 ◽  
pp. 012016
Author(s):  
H A Rejeki ◽  
Kunarso ◽  
Munasik
Keyword(s):  
Pacific Ocean ◽  
Indian Ocean ◽  
Interannual Variability ◽  
Sea Surface Height ◽  
Western Pacific ◽  
Sea Surface ◽  
Eastern Indian Ocean ◽  
Western Pacific Ocean ◽  
Geostrophic Current ◽  
Height Difference

India and the Allure of the ‘Indo-Pacific’

2012 ◽  
Vol 49 (3-4) ◽  
pp. 165-188 ◽  
Author(s):  
David Scott
Keyword(s):  
Pacific Ocean ◽  
Indian Ocean ◽  
Think Tanks ◽  
Western Pacific ◽  
Eastern Indian Ocean ◽  
Western Pacific Ocean ◽  
Indian Government ◽  
The Us ◽  
Inherent Part

This article looks at the attraction that the term ‘Indo-Pacific’ has gained in strategic discourse in and around the Indian government since 2010. A strong geopolitical and geo-economic sense of the Indo-Pacific has become apparent in this emergent Indo-Pacific discourse, which combines elements of India’s ‘Look South’ and ‘Look East’ policies, and in which a core Indo-Pacific of the eastern Indian Ocean and western Pacific Ocean has particular strategic coherence. Not only have government leaders adopted the term Indo-Pacific at various times, diplomats, navy service chiefs, influential think tanks and persuasive voices like Shyam Saran and C. Raja Mohan have also been noticeable in their use of the term. India’s bilateral and trilateral relations with Japan, Australia and the US have attracted particular Indo-Pacific associations in India. While a criticism of the term Indo-Pacific is that it has negative China-centric, balancing undertones, the article finds that although China-centric balancing frequently accompanies Indo-Pacific discourse, this is not an inherent part of the concept.

scholarly journals Spatiotemporal Variability of Remote Sensing Ocean Net Primary Production and Major Forcing Factors in the Tropical Eastern Indian and Western Pacific Ocean

2019 ◽  
Vol 11 (4) ◽  
pp. 391 ◽  
Author(s):  
Fanping Kong ◽  
Qing Dong ◽  
Kunsheng Xiang ◽  
Zi Yin ◽  
Yanyan Li ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Pacific Ocean ◽  
Indian Ocean ◽  
Primary Production ◽  
El Nino ◽  
Net Primary Production ◽  
Western Pacific ◽  
Sea Surface ◽  
Spatiotemporal Variability ◽  
Western Pacific Ocean

Based on widely used remote sensing ocean net primary production (NPP) datasets, the spatiotemporal variability of NPP is first analyzed over the tropical eastern Indian and western Pacific Ocean for the period 1998–2016 using the conventional empirical orthogonal function (EOF), the lead–lag correlation and the ensemble empirical mode decomposition (EEMD) technique. Barnett and Preisendorfer’s improved Canonical Correlation Analysis (BPCCA) is also applied to derive covariability patterns of NPP with major forcing factors of the chlorophyll a concentration (Chla), sea surface temperature (SST), sea level anomaly (SLA), ocean rainfall (Rain), sea surface wind (Wind), and current (CUR) under climate changes of El Niño–Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD). We find that: (1) The first two seasonal EOF modes capture significant temporal and meridional NPP variability differences, as NPP reaches peaks approximately three months later in the western Pacific Ocean than that of in the eastern Indian Ocean. (2) The second and third interannual EOF modes are closely related with ENSO with a two-month lag and synchronous with IOD, respectively, characterized by southwesterly positive anomaly centers during positive IOD years. (3) NPP presents different varying tendencies and similar multiscale oscillation patterns with interannual and interdecadal cycles of 2~3 years, 5~8 years, and 9~19 years in subregions of the Bay of Bengal, the South China Sea, the southeastern Indian Ocean, and the northwestern Pacific Ocean. (4) The NPP variability is strongly coupled with negative SST, SLA, and Rain anomalies, as well as positive Chla, Wind and CUR anomalies in general during El Niño/positive IOD years. The results reveal the diversity and complexity of large-scale biophysical interactions in the key Indo-Pacific Warm Pool region, which improves our understanding of ocean productivity, ecosystems, and carbon budgets.

Interannual Variability in Sea Surface Height at Southern Midlatitudes of the Indian Ocean

2021 ◽  
Vol 51 (5) ◽  
pp. 1595-1609
Author(s):  
Motoki Nagura ◽  
Michael J. McPhaden
Keyword(s):  
Indian Ocean ◽  
Interannual Variability ◽  
Sea Surface Height ◽  
Wind Forcing ◽  
Sea Surface ◽  
The South ◽  
South Indian Ocean ◽  
Eastern Boundary ◽  
South Indian ◽  
The Indian Ocean

AbstractThis study examines interannual variability in sea surface height (SSH) at southern midlatitudes of the Indian Ocean (10°–35°S). Our focus is on the relative role of local wind forcing and remote forcing from the equatorial Pacific Ocean. We use satellite altimetry measurements, an atmospheric reanalysis, and a one-dimensional wave model tuned to simulate observed SSH anomalies. The model solution is decomposed into the part driven by local winds and that driven by SSH variability radiated from the western coast of Australia. Results show that variability radiated from the Australian coast is larger in amplitude than variability driven by local winds in the central and eastern parts of the south Indian Ocean at midlatitudes (between 19° and 33°S), whereas the influence from eastern boundary forcing is confined to the eastern basin at lower latitudes (10° and 17°S). The relative importance of eastern boundary forcing at midlatitudes is due to the weakness of wind stress curl anomalies in the interior of the south Indian Ocean. Our analysis further suggests that SSH variability along the west coast of Australia originates from remote wind forcing in the tropical Pacific, as is pointed out by previous studies. The zonal gradient of SSH between the western and eastern parts of the south Indian Ocean is also mostly controlled by variability radiated from the Australian coast, indicating that interannual variability in meridional geostrophic transport is driven principally by Pacific winds.

scholarly journals Interannual Climate Variability over the Tropical Pacific Ocean Induced by the Indian Ocean Dipole through the Indonesian Throughflow

2013 ◽  
Vol 26 (9) ◽  
pp. 2845-2861 ◽  
Author(s):  
Dongliang Yuan ◽  
Hui Zhou ◽  
Xia Zhao
Keyword(s):  
Pacific Ocean ◽  
Indian Ocean ◽  
Tropical Indian Ocean ◽  
Sea Surface Height ◽  
Equatorial Pacific ◽  
Sea Surface ◽  
Indonesian Throughflow ◽  
Cold Tongue ◽  
The Indian Ocean ◽  
Southeastern Tropical Indian Ocean

Abstract The authors’ previous dynamical study has suggested a link between the Indian and Pacific Ocean interannual climate variations through the transport variations of the Indonesian Throughflow. In this study, the consistency of this oceanic channel link with observations is investigated using correlation analyses of observed ocean temperature, sea surface height, and surface wind data. The analyses show significant lag correlations between the sea surface temperature anomalies (SSTA) in the southeastern tropical Indian Ocean in fall and those in the eastern Pacific cold tongue in the following summer through fall seasons, suggesting potential predictability of ENSO events beyond the period of 1 yr. The dynamics of this teleconnection seem not through the atmospheric bridge, because the wind anomalies in the far western equatorial Pacific in fall have insignificant correlations with the cold tongue anomalies at time lags beyond one season. Correlation analyses between the sea surface height anomalies (SSHA) in the southeastern tropical Indian Ocean and those over the Indo-Pacific basin suggest eastward propagation of the upwelling anomalies from the Indian Ocean into the equatorial Pacific Ocean through the Indonesian Seas. Correlations in the subsurface temperature in the equatorial vertical section of the Pacific Ocean confirm the propagation. In spite of the limitation of the short time series of observations available, the study seems to suggest that the ocean channel connection between the two basins is important for the evolution and predictability of ENSO.

Sign in / Sign up

Export Citation Format

Share Document