Wei Yang

Two New Compounds Isolated From the Endophytic Fungus Guignardia Mangiferae VDL166 of Vaccinium Dunalianum

Jiao Yao, Ling‐Feng He, Sheng‐Yun Wei, Wei Yang et autres

ABSTRACT Two structurally new benzene derivatives, designated as Guignarphenyl A ( 1 ) and Guignarphenyl B ( 2 ), and one structurally unique meroterpenoid named Guignarpenoid A ( 6 ) were successfully isolated and identified from the solid fermentation products of the …

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How Does Topography Affect Land-Surface Observations from Geostationary Satellites?

Taiga Sasagawa, Kazuhito Ichii, Hiroki Yoshioka, Masayuki Matsuoka et autres

In recent years, Earth observation using geostationary satellites has experienced remarkable development. In particular, third-generation geostationary satellites, beginning with Japan’s Himawari-8, have enabled sub-hourly measurements of the Earth. Following Himawari-8, the U.S. GOES-R series, China’s FY-4A, Korea’s GK-2A, and Europe’s MTG-1 have …

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Development, validation, and application of a land surface reflectance and albedo dataset derived from Himawari-8/9

Kazuhito Ichii, Wei Li, Yuhei YAMAMOTO, Wei Yang et autres

Geostationary meteorological satellites such as Himawari-8/9 provide unprecedented high-frequency observations that enable detailed monitoring of land surface reflectance and albedo, which are key variables for terrestrial ecosystem and surface energy/carbon cycle studies. In this study, we will introduce our current status of …

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Modeling diurnal gross primary production in East Asia using Himawari-8/9 geostationary satellite data

Yuhei YAMAMOTO, Kazuhito Ichii, Wei Yang, Yui Shikakura et autres

Gross primary production (GPP) is a key indicator of plant growth and ecosystem health, and accurately capturing its diurnal variation is crucial for understanding vegetation responses to extreme heat and drought. However, the applicability of satellite-based semi-empirical models to diurnal GPP estimation …

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An enhanced RPV model to better capture hotspot signatures in vegetation canopy reflectance observed by the geostationary meteorological satellite Himawari-8

Wei Yang, Wei Li, Xuanlong Ma, Kazuhito Ichii

The hotspot effect denotes a special case of the Bidirectional Reflectance Distribution Function (BRDF) when the solar direction coincides with the sensor viewing direction, which is essential for remote estimation of canopy structure information. In contrast to polar-orbiting satellites, third-generation geostationary (GEO) …

Evaluation of Himawari-8/AHI land surface reflectance at mid-latitudes using LEO sensors with off-nadir observation

Beichen Zhang, Kazuhito Ichii, Wei Li, Yuhei YAMAMOTO et autres

Land-surface reflectance (LSR) is a basic physical retrieval in terrestrial monitoring. The potential for high-frequency surface product estimation was evident in third-generation Geostationary Earth Orbit (3rd-GEO) satellites, substantially improving spectral, spatial, and temporal resolutions. Intercomparisons with LSR products from Low Earth Orbit …

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Inversion of Soil Salinity in the Irrigated Region along the Southern Bank of the Yellow River Using UAV Multispectral Remote Sensing

Yuxuan Wang, Zhongyi Qu, Wei Yang, Xi Chen

Soil salinization is a global issue confronting humanity, imposing significant constraints on agricultural production in the irrigated regions along the southern bank of the Yellow River. This, in turn, leads to the degradation of the ecological environment and inadequate grain yields. Hence, …

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Brown carbon's emission factors and optical characteristics in household biomass burning: developing a novel algorithm for estimating the contribution of brown carbon

Jianzhong Sun, Yuzhe Zhang, Guorui Zhi, R. Hitzenberger et autres

Recent studies have highlighted the importance of brown carbon (BrC) in various fields, particularly relating to climate change. The incomplete combustion of biomass in open and contained burning conditions is believed to be a significant contributor to primary BrC emissions. So far, …

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Refinement of a diagnostic terrestrial ecosystem model using AsiaFlux network data toward GCOM-C SGLI GPP/NPP product

Jiawei Li, Kazuhito Ichii, Hideki Kobayashi, Wei Yang

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Wei Yang

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Wei Yang

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Wei Yang