Search Results 1-20 of 190

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Terrestrial ecosystem model studies and their contributions to AsiaFlux

ITO Akihiko , ICHII Kazuhito

… This review summarizes the achievements of model studies conducted in Asia, a focal region in the changing Earth system, especially collaborative works with the regional flux measurement network, AsiaFlux. … Model intercomparison studies were also conducted by using the AsiaFlux dataset for uncertainty analyses and benchmarking. … Finally, we discuss the present status and remaining issues in data-model integration, regional synthesis, and future projection with the models. …

Journal of Agricultural Meteorology 77(1), 81-95, 2021

J-STAGE
2

Marine ecosystem model and anthropogenic impact from regional to global scale [in Japanese]

野口真希 , 岸道郎

海洋と生物 42(5), 433-438, 2020-10
3

Climate change considerations are fundamental to management of deep‐sea resource extraction

Lisa A. Levin , Chih‐Lin Wei , Daniel C. Dunn , Diva J. Amon , Oliver S. Ashford , William W. L. Cheung , Ana Colaço , Carlos Dominguez‐Carrió , Elva G. Escobar , Harriet R. Harden‐Davies , Jeffrey C. Drazen , Khaira Ismail , Daniel O. B. Jones , David E. Johnson , Jennifer T. Le , Franck Lejzerowicz , Satoshi Mitarai , Telmo Morato , Sandor Mulsow , Paul V. R. Snelgrove , Andrew K. Sweetman , Moriaki Yasuhara

… Climate drivers will alter deep-sea biodiversity and associated ecosystem services, and may interact with disturbance from resource extraction activities or even climate geoengineering. … For example, Earth-System Model projections of climate-change parameters at the seafloor reveal heterogeneity in projected climate hazard and time of emergence (beyond natural variability) in regions targeted for deep-seabed mining. …

Global Change Biology 26(9), 4664-4678, 2020-07-06

IR
4

A Study of Environmental Geochemical Cycle between Atmosphere and Ocean : Potentials of Deposition of Atmospheric species to the Surface Marine Ecosystem [in Japanese]

TAKETANI Fumikazu

… To better understand this process, we developed improved numerical models by combining an atmospheric regional chemical transport model (WRF-CMAQ) and a 3-D lower trophic-marine ecosystem model (NEMURO). …

Vacuum and Surface Science 63(4), 165-170, 2020

J-STAGE
5

CMIP5 model analysis of future changes in ocean net primary production focusing on differences among individual oceans and models

Nakamura Yuki , Oka Akira

Journal of oceanography 75(5), 441-462, 2019-10
6

Marine biogeochemical cycles and structure of marine ecosystem in the ocean anoxic events during the Cretaceous [in Japanese]

HAGA MAYUKO , Tajika Eiichi , Ozaki Kazumi

白亜紀においては、海洋内部で貧酸素水塊が拡大する「海洋無酸素イベント(Oceanic Anoxic Events ; OAEs)」が複数の時期に生じた。白亜紀条件における海洋生物化学循環モデルに海洋生態系モデルを結合することで、白亜紀のOAEs発生時における海洋化学環境と基礎生産者の応答について調べた。その結果、白亜紀の平均的な気候条件では、現在の海洋と同様に藻類が主要な基礎生産 …

Abstracts of Annual Meeting of the Geochemical Society of Japan 66(0), 57, 2019

J-STAGE
7

Global carbon budget and climate stability in the Archean implied from a coupled model of atmospheric photochemistry, marine microbial ecosystem, and global carbon cycle. [in Japanese]

Watanabe Yasuto , Tajika Eiichi , Ozaki Kazumi , K. Hong Peng

 太古代の海水温は，当時の太陽が現在よりも暗かったにもかかわらず，気候は現在よりも温暖であったと推定されており，大気中にCO2やCH4などの温室効果ガスが多量に存在していたと考えられている．太古代の無酸素条件下における大気光化学系及び海洋微生物生態系の反応やメタンの温室効果は，当時の全球的 …

Abstracts of Annual Meeting of the Geochemical Society of Japan 66(0), 146, 2019

J-STAGE
8

Simulating topographic controls on the abundance of larch forest in eastern Siberia [in Japanese]

Sato Hisashi

… However, in Siberian larch-dominating-area, which is located on the environmental edge of existence of forest ecosystem, abundance of larch trees largely depends on topographic condition at the scale of tens to hundreds meters. … I, therefore, refined the hydrological sub-model of our dynamic vegetation model SEIB-DGVM, and validated whether the modified model can reconstruct topographic controls on the abundance of larch forest. …

The Japanese Forest Society Congress 130(0), 133, 2019

J-STAGE
9

Chemical speciation of trace metals in seawater [in Japanese]

Hirose Katsumi

… On the other hand, such metals as copper show toxicity to marine microorganisms in increasing concentrations of free ion. … is one of new topics in the 2000s because it affects not only ecosystem but also chemical forms of trace metals in seawater. … Development of chemical speciation of trace metals including chemical equilibrium model is required for better understanding of biogeochemical behaviors of trace metals and their ecological roles in oceanic water. …

Chikyukagaku 53(1), 13-39, 2019

J-STAGE
10

Causal Inference for Marine Ecosystems Based on Total Power Contribution [in Japanese]

ソルヴァン加藤比呂子 , Subbey Sam

要旨あり研究ノート

統計数理 = Proceedings of the Institute of Statistical Mathematics 66(2), 319-337, 2018-12

IR
11

Seasonal Response of North Western Pacific Marine Ecosystems to Deposition of Atmospheric Inorganic Nitrogen Compounds from East Asia

Taketani Fumikazu , Aita Maki N. , Yamaji Kazuyo , Sekiya Takashi , Ikeda Kohei , Sasaoka Kosei , Hashioka Taketo , Honda Makio C. , Matsumoto Kazuhiko , Kanaya Yugo

… The contribution of the atmospheric deposition of inorganic nitrogen compounds produced in East Asia to the marine ecosystems of the North Western Pacific Ocean (NWPO) was investigated in this study using a 3-D lower trophic-marine ecosystem model (NEMURO) combined with an atmospheric regional chemical transport model (WRF-CMAQ). …

Scientific Reports (8), 9324, 2018-06-29

IR
12

Ⅲ-6. Potential habitat for chum salmon (Oncorhynchus keta) in the Western Arctic based on a bioenergetics model coupled with a three-dimensional lower trophic ecosystem model [in Japanese]

UENO HIROMICHI , YOON SEOKJIN , WATANABE EIJI , J. KISHI MICHIO

NIPPON SUISAN GAKKAISHI 84(5), 931-931, 2018

J-STAGE
13

Response of lower trophic level ecosystems to decadal scale variation of climate system in the North Pacific Ocean [in Japanese]

Noguchi-Aita Maki , Chiba Sanae , Tadokoro Kazuaki

北太平洋における10数年規模の気候変動に関連した海洋生態系の変化について，これまで多くの研究が行われてきた。その代表的な事例として，1976/77年に発生した気候シフトに関する研究が挙げられる。これらの研究では，観測や数値モデルによって，1976/77年に発生した気候シフトがプランクトンから魚類に至る海洋生態系に大きな影響を与えたことが示されている。また，ここ約半世紀の間，北太平 …

Oceanography in Japan 27(1), 43-57, 2018

J-STAGE
14

Development of a marine ecosystem model to be embedded into an Earth system model [in Japanese]

Watanabe Michio , Noguchi-Aita Maki , Hajima Tomohiro

人為的に排出された二酸化炭素（CO2）のうち，大気に残留したCO2は地球温暖化を，海水に溶け込んだCO2は海洋酸性化を引き起こす。また，工業的窒素固定は，全球窒素循環を人為的に変化させるため，陸域・海洋での生物生産および炭素循環に影響を与えてい …

Oceanography in Japan 27(1), 31-41, 2018

J-STAGE
15

Institutional and Economic Analysis of Japanese Fisheries Management and Its Expansion into Marine Ecosystem Conservation

Makino Mitsutaku

Agri-bioscience monographs AGBM 7(1), 1-24, 2017
16

Development of benthic ecosystem model to estimate mortality and recovery processes of macrobenthos associated with dynamics of hypoxic water in the inner part of Mikawa Bay, Japan. [in Japanese]

Hashiguchi Seiho , Ichikawa Tetsuya , Taguchi Koichi , Imao Kazumasa , Sone Ryouta , Waku Mitsuyasu , Suzuki Teruaki , Nakata Kisaburo , Takabe Teruhiro

… In an inner bay ecosystem, benthic macrofauna (macrobenthos) plays such important roles as purifier of the sea water and as food source for higher trophic levels predators. … The ecosystem model is an effective method to predict the standing stock of macrobenthos that fluctuated drastically associated with dynamics of hypoxic water in the inner bay. …

Journal of Advanced Marine Science and Technology Society 23(1), 21-35, 2017

J-STAGE
17

Efforts to create a comprehensive management system for sustainable aquatic environments in coastal areas of subtropical regions: Constructing a management system to accommodate both human activities and coral reef ecosystems [in Japanese]

NAKANO Takuji , HATA Kyoko , KINJO Kensei , WATANABE Nobuo

与論島周辺海域のサンゴ被度と数値解析から得られた水温や硝酸性窒素の値には明らかな負の相関が示されるなどサンゴ生態系への影響要因として与論島周辺海域の潮流条件や窒素等の陸域由来の栄養塩が関与していることが示唆された。環境保全型営農手法の導入による陸域の栄養塩管理と海域潮流場・物質輸送モデルの構築・モニタリングを通じて，陸域に由来する栄養塩等の負荷低減対策の重要性の認識と啓発を図りな …

Journal of the Japanese Coral Reef Society 19(1), 95-108, 2017

J-STAGE
18

Osaka Bay in Japan as a model for investigating the factors controlling temporal and spatial persistence among introduced marine and brackish species in a heavily industrialized harbor [in Japanese]

Otani Michio , Willan Richard C.

… With five large and several small ports, Osaka Bay is heavily industrialized rendering the introduction of marine species that are not native to Japan inevitable. … It presents, therefore, an ideal model locality to investigate the presence and persistence of introduced marine and estuarine species. … We analyzed the factors responsible for these patterns statistically using a generalized linear model (GLM). …

Sessile Organisms 34(2), 28-37, 2017

J-STAGE
19

Insight into nitrous oxide production processes in the western North Pacific based on a marine ecosystem isotopomer model (SPECIAL SECTION : K2S1 project)

Yoshikawa Chisato , Abe Hitomi , Aita Maki N. , Breider Florian , Kuzunuki Keichi , Toyoda Sakae , Ogawa Nanako O. , Suga Hisami , Ohkouchi Naohiko , Danielache Sebastian O. , Wakita Masahide , Honda Makio C. , Yoshida Naohiro

Journal of oceanography 72(3), 491-508, 2016-06
20

Material circulation and production mechanism in coastal ecosystems [in Japanese]

笠井亮秀

水産海洋研究 = Bulletin of the Japanese Society of Fisheries Oceanography 80(2), 146-152, 2016-05

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