Diurnal variation of outgoing longwave radiation derived from I NSA T-I B data

In this paper, 3-hourly values of Outgoing Long wave Radiation (OLR) for the years 1987 .to 1990 over the Indian Ocean region, derived from'1NSAT-IB VHRR observations, have been used to study the patterns of diurnal variation of OLR. The nature of the diurnal variations over different regions such as desert, ocean, monsoon area and equatorial trough in four representative months of the year is discussed. The variations in the diurnal range of OLR and the hours of occurrence of OLR minimum and maximum, are also presented.Daily means of TNSAT OLR using all.eight 3-hour samples and four different pairs of. 12-hour samples were computed. Results show that they are highly correlated. However, averages made with OLR values corresponding to 0230 and 1430 local time are slight underestimates compared to the 8-sample averages, whereas averages based upon 0830 and 2030 local time are slight overestimates.

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A Contest of Status and Legitimacy in the Indian Ocean

10.1093/oso/9780199479337.003.0002 ◽

2018 ◽

Author(s):

David Brewster

Keyword(s):

Indian Ocean ◽

International System ◽

Special Role ◽

Indian Ocean Region ◽

Major Powers ◽

Threat Perceptions ◽

Ocean Region ◽

The Status ◽

The Indian Ocean ◽

The Asymmetry

This chapter examines Indian and Chinese perspectives of each other as major powers and their respective roles in the Indian Ocean. It focuses on the following elements: (a) China’s strategic imperatives in the Indian Ocean Region, (b) India’s views on its special role in the Indian Ocean and the legitimacy of the presence of other powers, (c) China’s strategic vulnerabilities in the Indian Ocean and India’s wish to leverage those vulnerabilities, (d) the asymmetry in Indian and Chinese threat perceptions, and (d) Chinese perspectives of the status of India in the international system and India’s claims to a special role in the Indian Ocean. The chapter concludes that even if China were to take a more transparent approach to its activities, significant differences in perceptions of threat and over status and legitimacy will produce a highly competitive dynamic between them in the maritime domain.

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Heat and freshwater changes in the Indian Ocean region

Nature Reviews Earth & Environment ◽

10.1038/s43017-021-00192-6 ◽

2021 ◽

Author(s):

Caroline C. Ummenhofer ◽

Sujata A. Murty ◽

Janet Sprintall ◽

Tong Lee ◽

Nerilie J. Abram

Keyword(s):

Indian Ocean ◽

Indian Ocean Region ◽

Ocean Region ◽

The Indian Ocean

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Spatiotemporal Evolution and Determinant Factors of the Intra-Regional Trade Community Structures of the Indian Ocean Region

ISPRS International Journal of Geo-Information ◽

10.3390/ijgi10040214 ◽

2021 ◽

Vol 10 (4) ◽

pp. 214

Author(s):

Lihua Yuan ◽

Xiaoqiang Chen ◽

Changqing Song ◽

Danping Cao ◽

Hong Yi

Keyword(s):

Indian Ocean ◽

Explanatory Power ◽

Community Structures ◽

Indian Ocean Region ◽

Spatiotemporal Evolution ◽

Regional Trade ◽

Determinant Factors ◽

Ocean Region ◽

The Indian Ocean ◽

The Impact

The Indian Ocean Region (IOR) has become one of the main economic forces globally, and countries within the IOR have attempted to promote their intra-regional trade. This study investigates the spatiotemporal evolution of the community structures of the intra-regional trade and the impact of determinant factors on the formation of trade community structures of the IOR from 1996 to 2017 using the methods of social network analysis. Trade communities are groups of countries with measurably denser intra-trade ties but with extra-trade ties that are measurably sparser among different communities. The results show that the extent of trade integration and the trade community structures of the IOR changed from strengthening between 1996 and 2014 to weakening between 2015 and 2017. The largest explanatory power of the formation of the IOR trade community structures was the IOR countries’ economic size, indicating that market remained the strongest driver. The second-largest explanatory power was geographical proximity, suggesting that countries within the IOR engaged in intra-regional trade still tended to select geographically proximate trading partners. The third- and the fourth-largest were common civilization and regional organizational memberships, respectively. This indicates that sharing a common civilization and constructing intra-regional institutional arrangements (especially open trade policies) helped the countries within the IOR strengthen their trade communities.

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