The biogenic silica variation and paleoproductivity evolution in the eastern Indian Ocean during the past 20 000 a

2019 ◽  
Vol 38 (1) ◽  
pp. 78-84
Author(s):  
Yonghang Xu ◽  
Liang Wang ◽  
Zhikun Lai ◽  
Xiaohui Xu ◽  
Feng Wang ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Biogenic Silica ◽  
Eastern Indian Ocean ◽  
The Past

Observations of warming on the Western Australian continental shelf

2007 ◽  
Vol 58 (10) ◽  
pp. 914 ◽  
Author(s):  
Alan Pearce ◽  
Ming Feng
Keyword(s):  
Indian Ocean ◽  
Continental Shelf ◽  
Southern Oscillation ◽  
Warming Trend ◽  
Eastern Indian Ocean ◽  
The South ◽  
Leeuwin Current ◽  
South Eastern ◽  
The Past ◽  
Western Australian

Global temperature datasets indicate a warming trend in the south-eastern Indian Ocean of ~0.02°C year–1. This is supported by in situ temperature measurements at a coastal monitoring station on the Western Australian continental shelf that have shown a mean temperature rise of 0.013°C year–1 since 1951, corresponding to ~0.6°C over the past 5 decades. Measurements from three other shallow stations between 1985 and 2004 indicated warming trends of 0.026–0.034°C year–1. It is suggested that enhanced air–sea heat flux into the south-eastern Indian Ocean may be a key factor in the rising temperature trend. There has also been a steady rise in salinity over the past half-century. At interannual scales, coherent temperature variability at the various stations indicates that larger-scale processes are influencing the shelf waters and are linked with El Niño/Southern Oscillation (ENSO)-related events in coastal sea level and hence the Leeuwin Current.

Nd and Pb isotope evolution of deep water masses in the eastern Indian Ocean during the past 33 Myr

2006 ◽  
Vol 226 (3-4) ◽  
pp. 264-279 ◽  
Author(s):  
Martin Frank ◽  
Nicholas Whiteley ◽  
Tina van de Flierdt ◽  
Ben C. Reynolds ◽  
Keith O'Nions
Keyword(s):  
Indian Ocean ◽  
Deep Water ◽  
Water Masses ◽  
Eastern Indian Ocean ◽  
Pb Isotope ◽  
The Past

scholarly journals Impact of the Strong Downwelling (Upwelling) on Small Pelagic Fish Production during the 2016 (2019) Negative (Positive) Indian Ocean Dipole Events in the Eastern Indian Ocean off Java

Climate ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 29
Author(s):  
Jonson Lumban-Gaol ◽  
Eko Siswanto ◽  
Kedarnath Mahapatra ◽  
Nyoman Metta Nyanakumara Natih ◽  
I Wayan Nurjaya ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Indian Ocean Dipole ◽  
Pelagic Fish ◽  
Eastern Indian Ocean ◽  
Fish Production ◽  
Small Pelagic Fish ◽  
Field Surveys ◽  
Chl A ◽  
Positive Indian Ocean Dipole ◽  
The Impact

Although researchers have investigated the impact of Indian Ocean Dipole (IOD) phases on human lives, only a few have examined such impacts on fisheries. In this study, we analyzed the influence of negative (positive) IOD phases on chlorophyll a (Chl-a) concentrations as an indicator of phytoplankton biomass and small pelagic fish production in the eastern Indian Ocean (EIO) off Java. We also conducted field surveys in the EIO off Palabuhanratu Bay at the peak (October) and the end (December) of the 2019 positive IOD phase. Our findings show that the Chl-a concentration had a strong and robust association with the 2016 (2019) negative (positive) IOD phases. The negative (positive) anomalous Chl-a concentration in the EIO off Java associated with the negative (positive) IOD phase induced strong downwelling (upwelling), leading to the preponderant decrease (increase) in small pelagic fish production in the EIO off Java.

scholarly journals History, piety and factional politics in the Arabic chronicle of the Maldives: Ḥasan Tāj al-Dīn’s Ta’rīkh and its continuations

2020 ◽  
Vol 74 (1) ◽  
pp. 195-220
Author(s):  
Andrew C. S. Peacock
Keyword(s):  
Indian Ocean ◽  
Political Life ◽  
Political Agenda ◽  
Islamic History ◽  
The Past ◽  
Conversion To Islam ◽  
Personal Experiences

AbstractThe Arabic chronicle (Ta’rīkh) of the Maldives composed by the qadi Ḥasan Tāj al-Dīn (d. 1139/1727) and continued by his nephew Muḥammad Muḥibb al-Dīn (1118/1706-1199/1785) and his grandson Ibrāhīm Sirāj al-Dīn (d. after 1243/1827) is major but unexploited source for not just Maldivian but also Indian Ocean history more broadly. Covering Maldivian history from the purported date of the islands’ conversion to Islam in 548/1143, the Ta’rīkh is also imbued with a specific pious and ethical agenda. It seeks to situate the Maldives in the broader context of Islamic history stretching back to the Rāshidūn Caliphs, while using the past to impart ethical lessons to its audience, ostensibly the Maldivian sultans. However, its authors were also deeply involved in the Maldives’ tumultuous political life, and their presentation of events is also influenced by their own personal experiences and factional affiliations. This article explores the pious, ethical and political agenda of the Ta’rīkh.

scholarly journals Biological productivity, terrigenous influence and noncrustal elements supply to the Central Indian Ocean Basin: Paleoceanography during the past ∼ 1 Ma

2005 ◽  
Vol 114 (1) ◽  
pp. 63-74 ◽  
Author(s):  
J. N. Pattan ◽  
Toshiyuki Masuzawa ◽  
D. V. Borole ◽  
G. Parthiban ◽  
Pratima Jauhari ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Ocean Basin ◽  
Biological Productivity ◽  
The Past ◽  
Central Indian Ocean ◽  
Central Indian Ocean Basin

scholarly journals Linkage between Interannual Variation of the East Asian Intraseasonal Oscillation and Mei-Yu Onset

2018 ◽  
Vol 32 (1) ◽  
pp. 145-160 ◽  
Author(s):  
Yonghong Yao ◽  
Hai Lin ◽  
Qigang Wu
Keyword(s):  
Indian Ocean ◽  
South China Sea ◽  
South China ◽  
El Niño ◽  
El Nino ◽  
East Asian ◽  
Intraseasonal Oscillation ◽  
Eastern Indian Ocean ◽  
Ep El Niño ◽  
Sst Anomalies

AbstractThe mei-yu onset over the middle to lower reaches of the Yangtze River Valley (MLYRV) varies considerably from early June to mid-July, which leads to large interannual changes in rainy-season length, total summer rainfall, and flooding potential. Previous studies have investigated the impact of El Niño–Southern Oscillation (ENSO) on the mei-yu onset. This study shows that a strong (weak) East Asian and western North Pacific (EAWNP) intraseasonal oscillation (ISO) in spring leads to an early (late) onset of the mei-yu over the MLYRV, and this ISO–mei-yu relationship is attributed to different types of ENSO in the preceding winter. A strong EAWNP ISO in spring is related to an eastern Pacific El Niño (EP El Niño) in the previous winter, and negative sea surface temperature (SST) anomalies in the eastern Indian Ocean and the South China Sea (SCS) in May, which can cause an early onset of the South China Sea summer monsoon that also favors an early mei-yu onset. In contrast, a weak EAWNP ISO in spring is associated with a central Pacific El Niño (CP El Niño) before April, but with an EP El Niño after April, and positive SST anomalies in both the eastern Indian Ocean and the SCS in May. A statistical forecast model combining the intensity of spring EAWNP ISO, CP ENSO, and EP ENSO indices shows a high prediction skill of the observed mei-yu onset date.

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