HadGEM2-AO를 이용한 북서태평양-동아시아 해역의 표층 수온 모의 특성 분석
Analysis of Sea Surface Temperature Simulation in the Northwestern Pacific and the East Asian Marginal Seas using HadGEM2-AO
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In this study, we evaluated the model performance with respect to Sea Surface Temperature (SST) and Net Heat Flux (NHF) by considering the characteristics of seasonal temperature variation and contributing factors and by analyzing heat budget terms in the Northwestern Pacific and East Asian Marginal Seas (110oE−160oE, 15oN−60oN) using the HadGEM2-AO historical run. Annual mean SST of the HadGEM2-AO is about 0.065oC higher than observations (EN3_v2a) from 1950 to 2000. Since 1960, the model has simulated well the long-term variation of SST and the increasing rate of SST in the model (0.014oC/year) is comparable with observations (0.013oC/year). Heat loss from the ocean to the atmosphere was simulated slightly higher in the HadGEM2-AO than that in the reanalysis data on the East Asian Marginal Seas and the Kuroshio region. We investigated the causes of temperature variation by calculating the heat budget equation in the two representative regions. In the central part of the Kuroshio axis (125oE−130oE, 25oN−30oN: Region A), both heat loss in the upper mixed layer by surface heat flux and vertical heat advection mainly cause the decrease of heat storage in autumn and winter. Release of latent heat flux through the heat convergence brought about by the Kuroshio contributes to the large surface net heat flux. Positive heat storage rate is mainly determined by horizontal heat advection from March to April and surface net heat flux from May to July. In the central part of the subtropical gyre (155oE−160oE, 22oN−27oN: Region B), unlike Region A, vertical heat advection predominantly causes the decrease of heat storage in autumn and winter. In spring and summer, surface heat flux contributes to the increase of heat storage in Region B and the period is two times longer than the period for Region A. In this season, shoaling of the mixed layer depth plays an important role in the increase of SST.
Abstract
In this study, we evaluated the model performance with respect to Sea Surface Temperature (SST) and Net Heat Flux (NHF) by considering the characteristics of seasonal temperature variation and contributing factors and by analyzing heat budget terms in the Northwestern Pacific and East Asian Marginal Seas (110oE−160oE, 15oN−60oN) using the HadGEM2-AO historical run. Annual mean SST of the HadGEM2-AO is about 0.065oC higher than observations (EN3_v2a) from 1950 to 2000. Since 1960, the model has simulated well the long-term variation of SST and the increasing rate of SST in the model (0.014oC/year) is comparable with observations (0.013oC/year). Heat loss from the ocean to the atmosphere was simulated slightly higher in the HadGEM2-AO than that in the reanalysis data on the East Asian Marginal Seas and the Kuroshio region. We investigated the causes of temperature variation by calculating the heat budget equation in the two representative regions. In the central part of the Kuroshio axis (125oE−130oE, 25oN−30oN: Region A), both heat loss in the upper mixed layer by surface heat flux and vertical heat advection mainly cause the decrease of heat storage in autumn and winter. Release of latent heat flux through the heat convergence brought about by the Kuroshio contributes to the large surface net heat flux. Positive heat storage rate is mainly determined by horizontal heat advection from March to April and surface net heat flux from May to July. In the central part of the subtropical gyre (155oE−160oE, 22oN−27oN: Region B), unlike Region A, vertical heat advection predominantly causes the decrease of heat storage in autumn and winter. In spring and summer, surface heat flux contributes to the increase of heat storage in Region B and the period is two times longer than the period for Region A. In this season, shoaling of the mixed layer depth plays an important role in the increase of SST.
참고문헌 (33)
- IPCC 5차 평가보고서 대응을 위한기후변화 시나리오 보고서, "국립기상연구소", 기상청 국립기상연구소, 117~ (2011)
- 민홍식, "한국 연안 표층수온의 경년변동과 장기변화", Ocean and Polar Research, 28(4), pp.415~423 (2006), 한국해양과학기술원
- 민홍식, "기후변화에 따른 동중국해 해양 순환 변화 예측에 대한 수치 실험 연구", Ocean and Polar Research, 34(4), pp.431~444 (2012), 한국해양과학기술원[DOI]
- 심정은, "동아시아 주변 해양에서의 표층 열속 분석", 석사, 대기과학과, pp.2014
- 백희정, "Climate Change in the 21st Century Simulated by HadGEM2-AO under Representative Concentration Pathways", 한국기상학회지, 49(5), pp.603~618 (2013), 한국기상학회
- Carson JS, "Model verification and validation", Proceedings of the 2002 winter conference, pp.52~58 (2002)
- Chen D, "The roles of vertical mixing, solar radiation, and wind stress in a model simulation of the sea surface temperature seasonal cycle in the tropical Pacific Ocean", J Geophys Res, 99(C10), pp.20345~20359 (1994)
- Chu PC, "Temporal and spatial variabilities of Japan sea surface temperature and atmospheric forcings", J Oceanogr, 54, pp.273~284 (1998)
- W. J. Collins, "Development and evaluation of an Earth-system model – HadGEM2", Geoscientific Model Development Discussions, 4(2), pp.997~1062 (2011), Copernicus GmbH[DOI]
- "Evaluation of the HadGEM2 model" (2008)[URL]
- Frankignoul C, "Air-sea feedback in the North Atlantic and surface boundary conditions for ocean models", J Climate, 11, pp.2310~2324 (1998)
- Frankignoul C., "The surface heat flux feedback. Part I: estimates from observations in the Atlantic and the North Pacific", Climate Dynamics, 19(8), pp.633~647 (2002), Springer Nature[DOI]
- Hirose N, "Heat budget in the Japan Sea", J Oceanogr, 52, pp.553~574 (1996)
- Hirose N, "Surface heat flux in the East China Sea and the Yellow Sea", J Phys Oceanogr, 29, pp.401~417 (1999)
- Ingleby B, "Quality control of ocean temperature and salinity profiles-historical and real time data", J Marine Syst, 65, pp.158~175 (2007)
- W. G. Large, "The global climatology of an interannually varying air–sea flux data set", Climate Dynamics, 33(2-3), pp.341~364 (2009), Springer Nature[DOI]
- Liu N, "Seasonal variations of air-sea heat fluxes and sea surface temperature in the northwestern pacific marginal seas", Acta Oceanol Sin, 33, pp.101~110 (2014)
- N. Bellouin, "The HadGEM2 family of Met Office Unified Model Climate configurations", Geoscientific Model Development Discussions, 4(2), pp.765~841 (2011), Copernicus GmbH[DOI]
- G. M. Martin, "The influence of dynamic vegetation on the present-day simulation and future projections of the South Asian summer monsoon in the HadGEM2 family", Earth System Dynamics, 3(2), pp.245~261 (2012), Copernicus GmbH[DOI]
- Martin GM, "The physical properties of the atmosphere in the new Hadley Centre global environmental model(HadGEM1), Part I : model description and global climatology", J Climate, 19, pp.1274~1301 (2006)
- Moisan JR, "The seasonal heat budget of the North Pacific : Net heat flux and heat storage rates(1950−1990)", J Phys Oceanogr, 28, pp.401~421 (1998)
- Na J, "Annual and seasonal variations of the sea surface heat fluxes in the East Asian Marginal Seas", J Oceanogr, 55, pp.257~270 (1999)
- Park T, "Effect of the Changjiang river discharge on sea surface warming in the Yellow and East China Seas in summer", Cont Shelf Res, 31, pp.15~22 (2011)
- Qiu B, "Synoptic-scale air-sea flux forcing in the Western North Pacific : observations and their impact on SST and the mixed layer", J Phys Oceanogr, 34, pp.2148~2159 (2004)
- Qiu B, "Upper-ocean heat balance in the Kuroshio extension region", J Phys Oceanogr, 23, pp.2027~2041 (1993)
- Suranjana Saha, "The NCEP Climate Forecast System Reanalysis", Bulletin of the American Meteorological Society, 91(8), pp.1015~1057 (2010), American Meteorological Society[DOI]
- Sugimoto S., "Influence of SST anomalies on winter turbulent heat fluxes in the eastern Kuroshio-Oyashio confluence region", J Climate, 27, pp.9349~9358 (2014)
- Sugimoto S, "Roles of SST anomalies on the wintertime turbulent heat fluxes in the Kuroshio-Oyashio confluence region : influences of warm eddies detached from the Kuroshio Extension", J Climate, 24, pp.6551~6561 (2011)
- Vivier F, "Heat budget in the Kuroshio extension region : 1993−99", J Phys Oceanogr, 32, pp.3436~3454 (2002)
- Wang W, "An assessment of the surface climate in the NCEP climate forecast system reanalysis", Clim Dynam, 37, pp.1601~1620 (2011)
- Yeh S-W, "Recent warming in the Yellow", East China Sea during winter and the associated atmospheric circulation, 2010, pp.30, 1428~1434
- Yeh S-W, "Analysis of characteristics in the sea surface temperature variability in the East", Japan Sea, 2010, pp.85, 213~223
- Multidecade global flux datasets from the objectively analyzed air-sea fluxes (OAFlux) project: latent and sensible heat fluxes, ocean evaporation, and related surface meteorological variables, "Yu L", Woods Hole Oceanographic Institution, 64~, pp.OAFlux Project Technical Report. OA-2008-01 (2008)