Epipelagic mesozooplankton communities in the northeastern Indian Ocean off Myanmar during the winter monsoon

The northern Andaman Sea off Myanmar is one of the relatively high productive regions in the Indian Ocean. The abundance, biomass and species composition of mesozooplankton and their relationships with environmental variables in the epipelagic zone(～200 m) were studied for the first time during the Sino-Myanmar joint cruise(February 2020). The mean abundance and biomass of mesozooplankton were(1 916.7±1 192.9) ind./m³ and(17.8±7.9) mg/m³, respectively. A total of 213 specie...     

Consistency of Tropospheric Water Vapor between Reanalyses and Himawari-8/AHI Measurements over East Asia

High spatiotemporal resolution radiances from the advanced imagers onboard the new generation of geostationary weather satellites provide a unique opportunity to evaluate the abilities of various reanalysis datasets to depict multilayer tropospheric water vapor(WV), thereby enhancing our understanding of the deficiencies of WV in reanalysis datasets.Based on daily measurements from the Advanced Himawari Imager(AHI) onboard the Himawari-8 satellite in 2016, the bias features of multilayer WV from...     

Petrogenesis of the Late Eocene to Early Oligocene Yao’an Shoshonitic Complex, Southeastern Tibet: Partial Melting of an Ancient Continental Lithospheric Mantle beneath the Yangtze Block

Cenozoic potassic–ultrapotassic igneous rocks are widespread in the southeastern Tibetan Plateau. Their petrogenesis and magmatic processes remain subject to debate in spite of numerous publications. Almost all of the Cenozoic extrusive and intrusive rocks in the Yao’an area, western Yunnan Province, SW China, are geochemically shoshonitic, collectively termed here the Yao’an Shoshonitic Complex (YSC). The YSC is located in the (south)easternmost part of the ENE?WSW-trending, ~550 km-long and ~250 km-wide Cenozoic magmatic zone; the latter separates the orthogonal and oblique collision belts of the India–Eurasia collision orogen. Previously published geochronological and thermochronological data revealed that the rocks of the YSC were emplaced over a short timespan of 34–32 Ma. This and our new data suggest that the primary magma of the YSC likely was formed by partial melting of ancient continental lithospheric mantle beneath the Yangtze Block. This part of the continental lithospheric mantle had likely not been modified by any oceanic subduction. Fractionation crystallization of an Mg- and Ca-bearing mineral and Ti-Fe oxides during the magmatic evolution probably account for the variable lithologies of the YSC.