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国家自然科学基金(41176006)

作品数:12 被引量:30H指数:3
相关作者:郭春迓刘秦玉更多>>
相关机构:中国海洋大学更多>>
发文基金:国家自然科学基金国家重点基础研究发展计划高等学校学科创新引智计划更多>>
相关领域:天文地球环境科学与工程更多>>

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12 条 记 录,以下是 1-10
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Different Responses of Sea Surface Temperature in the North Pacific to Greenhouse Gas and Aerosol Forcing被引量:1
2015年
The responses of Sea Surface Temperature(SST) to greenhouse gas(GHG) and anthropogenic aerosol in the North Pa- cific are compared based on the historical single and all-forcing simulations with Geophysical Fluid Dynamics Laboratory Climate Model version 3(GFDL CM3). During 1860–2005, the effect of GHG forcing on the North Pacific SST is opposite to that of the aerosol forcing. Specifically, the aerosol cooling effect exceeds the GHG warming effect in the Kuroshio Extension(KE) region dur- ing 1950–2004 in the CM3 single forcing. The mid-latitude response of ocean circulation to the GHG(aerosol) forcing is to enhance(weaken) the Subtropical Gyre. Then the SST warming(cooling) lies on the zonal band of 40?N because of the increased(reduced) KE warm advection effect in the GHG(aerosol) forcing simulations, and the cooling effect to SST will surpass the warming effect in the KE region in the historical all-forcing simulations. Besides, the positive feedback between cold SST and cloud can also strengthen the aerosol cooling effect in the KE region during boreal summer, when the mixed layer depth is shallow. In the GHG(aerosol) forcing simulations, corresponding to warming(cooling) SST in the KE region, the weakened(enhanced) Aleutian Low appears in the Northeast Pacific. Consequently, the SST responses to all-forcing in the historical simulations are similar to the re- sponses to aerosol forcing in sign and spatial pattern, hence the aerosol effect is quite important to the SST cooling in the mid-latitude North Pacific during the past 55 years.
WANG LiyiLIU Qinyu
关键词:NORTHPACIFICGREENHOUSEAEROSOL
Indian Ocean Dipole Response to Global Warming: A Multi-Member Study with CCSM4被引量:1
2013年
Based on a coupled ocean-atmosphere model, the response of the Indian Ocean Dipole (IOD) mode to global warming is investigated with a six member ensemble of simulations for the period 1850-2100. The model can simulate the IOD features rea-listically, including the east-west dipole pattern and the phase locking in boreal autumn. The ensemble analysis suppresses internal variability and isolates the radiative forced response. In response to increasing greenhouse gases, a weakening of the Walker circula-tion leads to the easterly wind anomalies in the equatorial Indian Ocean and the shoaling thermocline in the eastern equatorial Indian Ocean (EEIO), and sea surface temperature and precipitation changes show an IOD-like pattern in the equatorial Indian Ocean. Al-though the thermocline feedback intensifies with shoaling, the interannual variability of the IOD mode surprisingly weakens under global warming. The zonal wind feedback of IOD is found to weaken as well, due to decreased precipitation in the EEIO. Therefore, the atmospheric feedback decreases much more than the oceanic feedback increases, causing the decreased IOD variance in this model.
ZHOU Zhen-QiangXIE Shang-PingZHENG Xiao-TongLIU Qinyu
Changes in Mixed Layer Depth and Spring Bloom in the Kuroshio Extension under Global Warming被引量:1
2016年
The mixed layer is deep in January-April in the Kuroshio Extension region. This paper investigates the response in this region of mixed layer depth (MLD) and the spring bloom initiation to global warming using the output of 15 models from CMIP5. The models indicate that in the late 21st century the mixed layer will shoal and the MLD reduction will be most pronounced in spring at about 33~N on the southern edge of the present deep-MLD region. The advection of temperature change in the upper 100 m by the mean eastward flow explains the spatial pattern of MLD shoaling in the models. Associated with the shoaling mixed layer, the onset of spring bloom inception is projected to advance due to the strengthened stratification in the warming climate.
Ruosi ZHANGShang-Ping XIELixiao XUQinyu LIU
冬季黑潮延伸体海域云水含量的年际变化被引量:2
2013年
利用卫星观测的海面高度资料、海表温度资料和再分析大气资料,考察了冬季黑潮延伸体海域云水含量的年际变化。结果表明:尽管大气环流有明显的年际变化,海洋锋对其上云水含量的"锚定"作用(锋面南侧云水含量多,北侧少)始终存在,同时云水量值有明显的年际变化,该变化主要受背景大气环流的影响,当西北风加强(减弱)带来偏冷(暖)偏干(湿)的空气团时,锋面南侧云水少(多)。按照云水含量多少进行合成分析的结果表明:来自大陆的冬季西北风南下,在遇到海洋锋锋南侧的暖水面时,空气抬升导致的大气跨锋面的次级环流和对应锋面南(北)辐合(辐散)在一定程度上(约25%)受背景大气环流变化的影响。在背景大尺度的西北风强(弱)时,大气中水汽含量较少(多),凝结放热较弱(强),黑潮延伸体海洋锋南侧南侧上升,北侧下沉的次级环流偏弱(强)。
郭春迓刘秦玉
关键词:云水含量大气响应年际变化
Analysis on Long-Term Change of Sea Surface Temperature in the China Seas被引量:16
2013年
Long-term change of sea surface temperature (SST) in the China Seas from 1900 to 2006 is examined based on two different observation datasets (HadlSSTI and HadSST3). Similar to the Atlantic, SST in the China Seas has been well observed during the past 107 years. A comparison between the reconstructed (HadISSTI) and un-interpolated (HadSST3) datasets shows that the SST wanning trends from both datasets are consistent with each other in most of the China Seas. The warming trends are stronger in winter than in summer, with a maximum rate of SST increase exceeding 2.7℃ (100year)-I in the East China Sea and the Taiwan Strait during winter based on HadISSTI. However, the SST from both datasets experienced a sudden decrease after 1999 in the China Seas. The estimated trend from HadlSSTI is stronger than that fi'om HadSST3 in the East China Sea and the east of Taiwan Island, where the difference in the linear SST warming trends are as large as about 1℃ (100year)-I when using respectively HadISST1 and HadSST3 datasets. When compared to the linear winter warnling trend of the land surface air temperature (1.6℃ (100 year)-1), HadSST3 shows a more reasonable trend of less than 2.1℃( 100 year)-1 than HadISST 1 's trend of larger than 2.7℃ ( 100 year)-1 at the mouth of the Yangtze River. The restllts also indicate large uncertainties in the estimate of SST warming patterns.
LIU QinyuZHANG Qi
关键词:UNCERTAINTIES
Formation Mechanism for the Anomalous Anticyclonic Circulation over Northeast Asia and the Japan Sea in Boreal Winter 1997/98 and the Spring of 1998被引量:4
2013年
A robust anomalous anticyclonic circulation (AAC) was observed over Northeast Asia and the Japan Sea in boreal win-ter 1997/98 and over the Japan Sea in spring 1998. The formation mechanism is investigated. On the background of the vertically sheared winter monsoonal flow, anomalous rainfall in the tropical Indo-Western Pacific warm pool excited a wave train towards East Asia in the upper troposphere during boreal winter of 1997/98. The AAC over Northeast Asia and the Japan Sea is part of the wave train of equivalent barotropic structure. The AAC over the Japan Sea persisted from winter to spring and even intensified in spring 1998. The diagnostic calculations show that the vorticity and temperature fluxes by synoptic eddies are an important mechanism for the AAC over the Japan Sea in spring 1998.
WANG HaiLIU QinyuZHENG Jian
Different Response of Sea Surface Temperature in the North Pacific to Greenhouse Gas and Aerosol Forcing
The responses of Sea Surface Temperature(SST) to greenhouse gas(GHG) and anthropogenic aerosol in the North Pa...
WANG LiyiLIU Qinyu
关键词:RESPONSEAEROSOL
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Response of North Pacific Eastern Subtropical Mode Water to Greenhouse Gas Versus Aerosol Forcing被引量:1
2016年
Mode water is a distinct water mass characterized by a near vertical homogeneous layer or low potential vorticity, and is considered essential for understanding ocean climate variability. Based on the output of GFDL CM3, this study investigates the response of eastern subtropical mode water (ESTMW) in the North Pacific to two different single forcings: greenhouse gases (GHGs) and aerosol. Under GHG forcing, ESTMW is produced on lighter isopycnal surfaces and is decreased in volume. Under aerosol forcing, in sharp contrast, it is produced on denser isopycnal surfaces and is increased in volume. The main reason for the opposite response is because surface ocean-to-atmosphere latent heat flux change over the ESTMW formation region shoals the mixed layer and thus weakens the lateral induction under GHG forcing, but deepens the mixed layer and thus strengthens the lateral induction under aerosol forcing. In addition, local wind changes are also favorable to the opposite response of ESTMW production to GHG versus aerosol.
Xiang LIYiyong LUO
关键词:AEROSOL
Fast and Slow Responses of the North Pacific Mode Water and Subtropical Countercurrent to Global Warming被引量:2
2013年
Six coupled general circulation models from the Coupled Model Intercomparison Project Phase 5 (CMIP5) are em-ployed for examining the full evolution of the North Pacific mode water and Subtropical Countercurrent (STCC) under global warming over 400 years following the Representative Concentration Pathways (RCP) 4.5. The mode water and STCC first show a sharp weakening trend when the radiative forcing increases, but then reverse to a slow strengthening trend of smaller magnitude after the radiative forcing is stablized. As the radiative forcing increases during the 21st century, the ocean warming is surface-intensified and decreases with depth, strengthening the upper ocean's stratification and becoming unfavorable for the mode water formation. Moving southward in the subtropical gyre, the shrinking mode water decelerates the STCC to the south. After the radiative forcing is stabilized in the 2070s, the subsequent warming is greater at the subsurface than at the sea surface, destabilizing the upper ocean and becoming favorable for the mode water formation. As a result, the mode water and STCC recover gradually after the radiative forc-ing is stabilized.
XU LixiaoXIE Shang-PingLIU Qinyu
Response of Mode Water and Subtropical Countercurrent to Greenhouse Gas and Aerosol Forcing in the North Pacific被引量:3
2013年
The response of the North Pacific Subtropical Mode Water and Subtropical Countercurrent (STCC) to changes in greenhouse gas (GHG) and aerosol is investigated based on the 20th-century historical and single-forcing simulations with the Geo-physical Fluid Dynamics Laboratory Climate Model version 3 (GFDL CM3). The aerosol effect causes sea surface temperature (SST) to decrease in the mid-latitude North Pacific, especially in the Kuroshio Extension region, during the past five decades (1950-2005), and this cooling effect exceeds the warming effect by the GHG increase. The STCC response to the GHG and aerosol forcing are opposite. In the GHG (aerosol) forcing run, the STCC decelerates (accelerates) due to the decreased (increased) mode waters in the North Pacific, resulting from a weaker (stronger) front in the mixed layer depth and decreased (increased) subduction in the mode water formation region. The aerosol effect on the SST, mode waters and STCC more than offsets the GHG effect. The response of SST in a zonal band around 40?N and the STCC to the combined forcing in the historical simulation is similar to the response to the aerosol forcing.
WANG LiyiLIU QinyuXU LixiaoXIE Shang-Ping
关键词:AEROSOL
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