Xiaopei Lin WESTPAC Principal Investigator 12 th Intergovernmental Session of the IOC Sub-Commission for the Western Pacific Manila, the Philippines, 2-5 April 2019 Air-Sea Interaction in the Kuroshio Extension and its Climate Impact (AIKEC) Progress and outputs (May 2017- April 2019) Workplan ( May 2019-April 2021)
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Xiaopei LinWESTPAC Principal Investigator
12th Intergovernmental Session of the IOC Sub-Commission for the Western PacificManila, the Philippines, 2-5 April 2019
Air-Sea Interaction in the Kuroshio Extension and its Climate Impact
(AIKEC)Progress and outputs (May 2017- April 2019)
An Assessment of Representation of Oceanic Mesoscale Eddy-Atmosphere interaction (OMEA) in the Current Generation of General Circulation Models and Reanalyses
l The overall intensity and spatial distribution of OMEA interaction differ significantly among models.
l Surface wind strength and MABL adjustment are two important factors accounting for the inter-model difference.l Fully coupled simulations are necessary to accurately simulate the energy pathway of mesoscale eddies.
Yang et al. 2018 GRL
• Long-term observations for buoys and subsurface moorings
• Shipboard submesoscale to mesoscale processes observations;
• Autonomous underwater/surface vehicles under high sea condition
and strong currents;
Challenges
Workplan (May 2019 – April 2021)
Plan A: Maintaining long-term observations in Kuroshio Extension
China (OUC) have sustained 3 subsurface moorings since 2014, which are located at the south/axis/north of Kuroshio Extension.
A tentative surface buoy (CKEO) was deployed in 2017.10 and recovered in 2018.5, which will be deployed again on October, 2019.
OUC will maintain CKEO in future for long time. It will be a twin-buoy for KEO.
Workplan (May 2019 – April 2021)Plan A: Maintaining long-term observations in Kuroshio Extension
2019-crusie planDate: 2019.10.1-2019.11.20RV: Dongfanghong 3 (5000T)Mission:1) re-deploy the CKEO at
39N,149.25E2) Intensive observation within an
eddy using multi-platforms like drifting air-sea interface buoy, wave glider, deep argo and core-argo (the argo float is designed and manufactured by China)
3) Regular CTD casts along the 147.5E section.
4) Underway observations using VMS met-stations, ship-board ADCP, underway CTD. 147.5E line
Workplan (May 2019 – April 2021)
Plan B: The Drifting Air-Sea Interface Buoy (DrIB) and its potential contribution to global data acquisitions of air-sea parameters
p China will draft a 10-year program for developing a global air-sea observing network that uses the drifting air-sea interface buoys (DrIB), which can serve as a critical complement to global observing system for air-sea interface and help enrich the global drifter program with more approaches.
p The design of latest version of DrIB has been finalized after two-years’ testing and achieved a certain adaptability and stability in operation (TRL=5).
Characteristic:■ Following the current■ Real time data communication■ Bidirectional communication on line■ Small volume (R.max=0.5m,H.surface=3m)■ Light weight (<50KG)■ Easy deployed
Obs.Parameter and Accuracy
Range Accuracy
Wind Speed. 0~40 m/s < 5%RMSWind Direction 0~360° ±10°Air Temperature -20~50℃ ±0.25℃Air Pressure 850~1050hPa ±1 hPaRelative Humidity 0~100RH ±2RHSST -5~40℃ ±0.005℃
Expected outputs and/or outcome
• Set up a long-term observation system to serve the community
• Meet the weather forecast and social-economy needs
• Develop new tech for the ocean observation
Be part of the future global observation system, especially the boundary current operational system
Improve our understanding about the multi-scale ocean and climate variability