Kenzo Kitamura

The JapanFlux2024 dataset for eddy covariance observations covering Japan and East Asia from 1990 to 2023

Masahito Ueyama, Yuji Takao, Makiko Tanaka, Hironori Yabuki et autres

Eddy covariance observations play a pivotal role in understanding the land–atmosphere exchange of energy, water, carbon dioxide (CO 2 ), and other trace gases, as well as the global carbon cycle and earth system. To promote the networking of individual measurements and …

ve, jp, bd, cn, us, de, tw, uz, ru (code pays fourni par la source)

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 …

jp, kr, de (code pays fourni par la source)

The JapanFlux2024 dataset for eddy covariance observations covering Japan and East Asia from 1990 to 2023

Masahito Ueyama, Yuji Takao, Makiko Tanaka, Hironori Yabuki et autres

Abstract. Eddy covariance observations play a pivotal role in understanding the land–atmosphere exchange of energy, water, carbon dioxide (CO2), and other trace gases, as well as the global carbon cycle and earth system. To promote the networking of individual measurements and the …

jp, bd, cn, us, de, tw, uz, ru (code pays fourni par la source)

Long‐term precipitation and stream discharge records at seven forested experimental watersheds along a latitudinal transect in Japan: Jozankei, Kamabuchi, Takaragawa, Tsukuba, Tatsunokuchi‐yama, Kahoku and Sarukawa

Takanori Shimizu, Koji Tamai, Ikuhiro Hosoda, Shoji NOGUCHI et autres

Abstract This data note introduces a database of long‐term daily total precipitation and stream discharge data for seven forested watersheds in Japan that have been continuously monitored by the Forestry and Forest Products Research Institute. Three of the watersheds started data collection …

jp, us (code pays fourni par la source)

Increases in Biogenic Volatile Organic Compound Concentrations Observed after Rains at Six Forest Sites in Non-Summer Periods

Takafumi Miyama, Tomoaki Morishita, Yuji Kominami, Hironori Noguchi et autres

Since biogenic volatile organic compounds (BVOCs) are important precursors of ozone, the monitoring of the BVOC concentration distributions is needed. In general, forest BVOC concentrations increase in summer as well as in other seasons. This study aims to detect temporally sporadic increases …

jp (code pays fourni par la source)

Droplet Evaporation of an Azeotropic Mixture on a Superheated Surface

Takashi Suzuki, Akihiko Mitsuishi, Kenzo Kitamura

New data‐driven estimation of terrestrial CO 2 fluxes in Asia using a standardized database of eddy covariance measurements, remote sensing data, and support vector regression

Kazuhito Ichii, Masahito Ueyama, Masayuki Kondo, Nobuko Saigusa et autres

Abstract The lack of a standardized database of eddy covariance observations has been an obstacle for data‐driven estimation of terrestrial CO 2 fluxes in Asia. In this study, we developed such a standardized database using 54 sites from various databases by applying …

jp, us, kr, ph, se, ru, ch, Kenya, in, cn (code pays fourni par la source)

Network connection of tower flux measurement data :Toward long term stable flux measurement

Yuji Kominami, Katsumi Yamanoi, Kenzo Kitamura, Takafumi Miyama et autres

札幌森林気象試験地の気象（1999～2008年）

Yasuko MIZOGUCHI, Katsumi Yamanoi, Kenzo Kitamura, Yuichiro Nakai et autres

溝口 康子

jp (code pays fourni par la source)

A141 Experimental observation of vaporizing behavior of water droplet on heated surface : A review of the surface-roughness effects

Takashi Suzuki, Toyoki Fukuda, Akihiko Mitsuishi, Kenzo Kitamura

Experimental investigations were made on the vaporizing behavior of water droplet on heated brass surfaces with different polish finishes; rough polish #400 to extremely fine polish #15000 in comparison to previous studies. The surfaces were nickel & gold plated for good experimental …

jp (code pays fourni par la source)

Forest Damage by a Tornado Run between Joso City to Tsukuba City on May 6, 2012

Satoru Suzuki, Yoshiaki Goto, Kenzo Kitamura, Satoru Takanashi et autres

平成24年5月6日に茨城県常総市からつくば市にかけて竜巻が発生した。つくば市山木地区と平沢地区の森林被害を調査した。平沢地区の標高50∼130 mの斜面に, 直径250∼300 mの円形の被害発生領域がみられ, この円形領域で竜巻が消滅したと考えられた。この竜巻が消滅した地点を除き, 次の特徴がみられた。 (1) 壊滅的な被害は100 m前後の幅で発生し, これは竜巻のスケールを反映していると考えられた。 (2) 広葉樹を主体とした森林や強風被害を受けにくい条件を備えた森林とも壊滅的な被害を受けたことから, ひとたび竜巻の経路にあたれば, 林況にかかわらず壊滅的な被害が生じると考えられた。 (3) 倒木は竜巻経路の中心に向かって倒れる傾向がみられた。これは竜巻による強風の特徴である風の収束を反映していると考えられた。

jp (code pays fourni par la source)

Interannual variability of net ecosystem production for a broadleaf deciduous forest in Sapporo, northern Japan

Kenzo Kitamura, Yuichiro Nakai, Satoru Suzuki, Yoshikazu Ohtani et autres

To estimate net ecosystem production (NEP), ecosystem respiration (RE), and gross primary production (GPP), and to elucidate the interannual variability of NEP in a cool temperate broadleaf deciduous forest in Sapporo, northern Japan, we measured net ecosystem exchange (NEE) using an eddy …

jp (code pays fourni par la source)