Future plan of JAMSTEC Argo - Core Argo and Argo extensions - Shigeki Hosoda Research and Development Center for Global Change (RCGC) JAMSTEC
Core Argo, Deep and Bio/BGC Argo We consider research targets to clarify global/regional scale oceanic variability associated with climate and ocean environment changes by core Argo and Argo extensions. a) Core Argo Ocean circulation Changes in temperature and salinity b) Bio/BGC Argo Global carbon cycle Ocean acidification Bio diversity c) Deep Argo Global deep ocean circulation Anthropogenic carbon sinking Carrying out with the research tools of ships, mooring, satellite observations and data assimilation models.
Core Argo Core Argo is an important key tool for climate research Filling Argo float in the gap Planning to deploy in sparse area in collaboration with voluntary ships of fishery school, high school, commercial company. Analyses of seasonal/long-term oceanic changes based on the core Argo data and data assimilation system (ESTOC) Pilot study for improvement Argo array Masuda et al. (2014) Carrying out pilot observations with sensitivity analyses of climate signals.
Deep Argo Existing commercial products or developing deep floats. Planning to deploy Deep Argo float (4000 or 6000m type) in the Pacific and Indian Ocean. Johnson et al. (2015) Analyses of heat/ freshwater storage changes by deep Argo array with higher spatial and temporal density. WHP analysis by Kouketsu et al. (2011) Investigation to clarify mechanism and amount of transport of heat/ freshwater, their variability. 4D-VAR data assimilation system (ESTOC) enables us investigate long-term change in the global ocean. Masuda et al. (2010)
BGC/Bio Argo Existing Bio-geochemical Argo Float with Oxy, Chl-a, NO3, bb and ph Local / process study Present status: BGC-floats in the world oceans Global Network (including deep ocean) Time series of Anthropogenic CO2 concentration estimated from ESTOC. Doi et al. (2015) Data assimilation (e.g. ESTOC) with Global network for BGC Argo (Oxy, Chl-a, NO 3 etc.) will make us achieve, a) Accurate ocean state estimate for carbon cycle associated with anthropogenic CO 2. b) Improvement of initial condition for ocean state projection.
Long term variability of mid- and deep ocean circulation and carbon cycle WOCE P1 line Global Argo array Salinity @27.0γ(2014) WHP sectional data can produce accurate information of interannual or longer-term change in physical biogeochemical oceanic change. BGC & Deep Argo array Salinity@P1 (2014-2007) AntCO2@P1 (from T,S,O2) Limited observation temporally and spatially. Dr.Kouketsu: personal comm. Getting Deep Argo and BGC Argo data with high spatial and temporal density (but accuracy is lower than WHP), Possible to map and estimate global carbon cycle and accumulation of anthropogenic CO 2 with Argo extension data and assimilation data like ESTOC.
Development of sensors/ floats in JAMSTEC --- Mini-Fast Repetition Rate Fluorometer (mini-frrf) (Tetsu Fujiki, JAMSTEC). The FRRF can be used in autonomous platform systems (buoy moorings, drifters and floats) for estimation of phytoplankton productivity (Chl a, and O 2 evolution) and assessment of nutrient limitations. 50cL bottle Challenges: down of size and cost save electric power Schedule (FY): 2014 Bench-top mini-frrf (performance verification) 2015 Submersible mini-frrf 2016 Field tests (current stage) 2017 Deployment of floating floats equipped with mini-frrf Size: diameter 72mm, length 550 mm Weight: 2.3 kg (in air), 0.55 kg (in water)
Checks of float&sensor and data quality contorol Float check and CTD sensor calibration in JAMSTEC s laboratory will be continued. Improvement of method and instruments. Global maps, dataset and variable tools are produced and will be developed. Delayed mode data QC and PARC are conducted. Further development of QC for Deep and BGC Argo floats data will be developed, communicating with ADMT members. Dataset of physical and biogeochemical ocean state estimate (ESTOC etc.) are produced and will be developed. http://www.godac.jamstec.go.jp/estoc/e CEIST/GODAC
Outreach and collaboration for Argo Many Argo floats are deployed by voluntary ships, while students in fishery schools learn Argo and climate change. User meeting is held for research scientists, graduate students, and manufacturer to get better understanding for Argo. Over 30 ships have been used to deploy Argo float Sailing ship おしょろ丸 ( 北海道大学 ), 海鷹丸 ( 東京海洋大学 ), 望星丸 ( 東海大学 ), 湘南丸 ( 神奈川県立海洋科学高等学校 [ 旧 三崎水産高校 ]), やいづ ( 静岡県立焼津水産高校 ), 宮城丸 ( 宮城県水産高校 / 宮城県教育委員会 ), 日新丸 海幸丸 ( 日本鯨類研究所 ), 第二昭南丸 ( 国際捕鯨委員会 日本鯨類研究所 ), しらせ ( 国立極地研究所 ), 照洋丸 開洋丸 ( 水産庁 ), 耕洋丸 ( 水産大学校 ), 北光丸 ( 北海道区水産研究所 ), 若竹丸 ( 北海道区水産研究所 / 北海道教育庁 ), 若鷹丸 北鳳丸 ( 東北区水産研究所 ), たか丸 ( 水産工学研究所 ), 第八白嶺丸 ( 水産総合研究センター開発調査センター ), 拓洋 昭洋 天洋 明洋 海洋 ( 海上保安庁 ), 凌風丸 啓風丸 高風丸 清風丸 長風丸 ( 気象庁 ), 白鳳丸 淡青丸 ( 東京大学海洋研究所 /JAMSTEC), みらい かいよう よこすか (JAMSTEC) NYK TERRA( 日本郵船 ) 海王丸 ( 航海訓練所 ) Partnership of voluntary float deployment is also important hereafter. Argo and ocean/climate symposiums for public citizen
Future deployment plan In FY2016, JAMSTEC plans to deploy about 23 floats (iridium+ctd) for core Argo mainly in the North Pacific. 2 or 3 Deep NINJA and 1 Deep APEX with Oxygen will deploy as Argo equivalent float in the Southern Ocean and North Pacific Ocean. 1 BGC float (iridium+do, Chl-a, bb) will deploy in the North Pacific. Deployment plans on and after FY2017 are unfixed yet. Global Argo Bio/BGC Argo Deep Argo Our activity for Argo are shown at poster presentation.