Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Impact of Autumn SST in the Japan Sea on Winter Rainfall and Air Temperature in Northeast China Impact of Autumn SST in the Japan Sea on Winter Rainfall and Air Temperature in Northeast China  [PDF]
SHI Xiaomeng,SUN Jilin,WU Dexing,YI Li,WEI Dongni
- , 2015,
Abstract: We studied the impact of sea surface temperature anomaly(SSTA) in the Japan Sea and the sea area east of Japan on the winter rainfall and air temperature in Northeast(NE) China using the singular value decomposition(SVD) and empirical orthogonal function(EOF). The monthly-mean rainfall data observed at 160 stations in China, monthly-mean sea surface temperature(SST) of the Hadley Center for Climate Prediction and Research and monthly-mean air temperature from the NCEP reanalysis during 1960–2011 were used. Correlation analysis indicates that the SSTAs in the Japan Sea in September may last for three or four months and are an important index for forecasting the winter rainfall and air temperature in NE China. Positive SSTAs in the central Japan Sea and in the sea area east of Tokyo correspond to positive rainfall anomaly and negative air temperature anomaly in NE China. With the rise of SST in the Japan Sea, a weak cyclone appears over the Japan Sea. The northeasterly wind transports water vapor from the Okhotsk to NE China, resulting in more rainfall and lower air temperature. Negative SSTA years are accompanied by warmer air temperature and less snow in NE China. The 1000 h Pa geopotential height anomaly and wind anomaly fields are simulated by IAP-9L model, which supports the analysis results
The Relationship between Winter Extreme Minimum Temperature Events and Sea Surface Temperature and Sea Ice in China

胡蓓蓓, 黄菲, 晋鹏
Climate Change Research Letters (CCRL) , 2015, DOI: 10.12677/CCRL.2015.43015
Abstract: 本文利用站点资料和再分析资料分析中国冬季南、北方区域极端低温事件与海温和海冰的关系。研究发现,中国南、北方区域极端低温频数下降趋势与全球变暖有关,极端低温频数的线性趋势与印度洋和北大西洋海温异常呈负相关,还与前期边缘海海冰特别是格陵兰–巴伦支海海冰异常呈正相关。对于北方区域,在年代际变化尺度上,极端低温事件偏多时,冬季北太平洋海温表现为北负南正的异常分布,格陵兰–巴伦支海海冰呈正异常。在年际变化尺度上,冬季北太平洋中部与北美西岸海域海温出现西负东正的异常分布,北美东岸海温表现为负异常,楚科奇海和新瓦尔巴群岛以北海区海冰呈负异常。对南方区域,在年代际变化尺度上,极端低温事件偏多与PDO冷位相有关,并与格陵兰海和白令海海冰异常呈正相关,其他海区海冰异常呈负相关。在年际变化尺度上,前期阿拉斯加湾和白令海海区异常偏冷,对应着冬季南方区域极端低温事件偏多,另外还与冬季太平洋扇区海冰异常存在显著负相关关系。
Based on the dataset of daily minimum temperature in China during 1961-2010 and reanalysis data, the relationship between winter extreme minimum temperature (EMT) frequency and sea surface temperature (SST) and sea ice is analyzed. Research shows that, the decline of EMT fre-quency both in the north and south of China is associated with global warming. The linear trend has a negative correlation with the SST anomalies in the North Atlantic and India Ocean, and can be preceded by melting of the marginal sea ice, especially in the Greenland-Barents Sea ice during the preceding summer and autumn. For the north of China, its inter-decadal (ID) component may be affected by North Pacific SST anomalies which has a north-negative and south-positive distribution, and has a positive correlation with Greenland-Barents sea ice. While inter-annual (IA) component has a significant negative correlation with the SST anomalies along the east coast of North American and the anomalous SST between the subtropical North Pacific Ocean and the Gulf of Alaska represents a distribution of the dipole oscillation. And it is also affected by the sea ice melting in Chukchi Sea and Sea area in the north of Svalbard. On the other hand, for the south of China, its ID component is remarkable influenced by Pacific Decadal Oscillation (PDO). It also has a negative correlation with the marginal sea ice except the Greenland Sea and the Bering Sea. Beyond the IA time scale, the SST anomalies over the Bering Sea and the Gulf of Alaska prelude the anomalous winter EMT in the south of China. In addition, it also has a significant negative correlation with Pacific sector sea ice.
Autumn, Winter (Selected Poems from Venets) [In Bulgarian]  [PDF]
D. Bozhkova
Venets : The Belogradchik Journal for Local History, Cultural Heritage and Folk Studies , 2010,
Abstract: This is a selection of poems published during the years in the journal “Venets”. The admiration to the Bulgarian autumn and winter is their basic clue.
Heavy Metals in Commercial Fish from the Barents Sea (Winter 2011)  [cached]
Zhilin A. Y.,Plotitsyna N. F.,Lapteva A. M.
E3S Web of Conferences , 2013, DOI: 10.1051/e3sconf/20130111008
Abstract: To assess the significance of metals in biota of the Barents Sea, preliminary information is presented on concentrations of Cu, Zn, Ni, Cr, Mn, Co, Pb, Fe, Cd and As in livers and muscle tissues of 3 commercial fish species collected in winter 2011. Generally, our results are within the reported literature range for regarding some commercially important species like cod and flounders indicating that metal levels are not elevated. The interspecific variability is not substantial; we only found significant difference for Fe concentrations for muscle, with the highest concentrations measured in long rough dab and the lowest in cod. To assess whether metal levels found in fish samples from the Barents Sea are safe for human consumption, a comparison is made to reference values for fish muscle and fish liver. Available data suggest that all muscle and liver of fish analysed in this study may be regarded as safe, since they are far below these thresholds.
ENSO events and interannual variations of winter sea-ice in the Greenland, the Kara and the Barents Seas
Bingyi Wu,Dengyi Gao,Ronghui Huang
Chinese Science Bulletin , 1997, DOI: 10.1007/BF02882872
Abstract: The third year before ENSO events happened, 62.5% ofthe variation velocities of winter sea-ice extent in the Greenland, the Kara and the Barents Seas reached a negative extreme value.
Effects of autumn-winter Arctic sea ice on winter Siberian High
BingYi Wu,JingZhi Su,RenHe Zhang
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-011-4696-4
Abstract: The intensity of the winter Siberian High has significantly negative correlations with Arctic sea ice concentration anomalies from the previous autumn to winter seasons in the Eastern Arctic Ocean and Siberian marginal seas. Our results indicate that autumn-winter Arctic sea ice concentration and concurrent sea surface temperature anomalies are responsible for the winter Siberian High and surface air temperature anomalies over the mid-high latitudes of Eurasia and East Asia. Numerical experiments also support this conclusion, and consistently show that the low sea ice concentration causes negative surface air temperature anomalies over the mid-high latitudes of Eurasia. A mechanism is proposed to explain the association between autumn-winter sea ice concentration and winter Siberian High. Our results also show that September sea ice concentration provides a potential precursor for winter Siberian High that cannot be predicted using only tropical sea surface temperatures. In the last two decades (1990–2009), a strengthening trend of winter Siberian High along with a decline trend in surface air temperature in the mid-high latitudes of the Asian Continent have favored the recent frequent cold winters over East Asia. The reason for these short-term trends in winter Siberian High and surface air temperature are discussed.
Impacts of Polar Vortex, NPO, and SST Configurations on Unusually Cool Summers in Northeast China. Part I: Analysis and Diagnosis
Impacts of Polar Vortex, NPO, and SST Configurations on Unusually Cool Summers in Northeast China Part I: Analysis and Diagnosis

LIAN Yi,SHEN Baizhu,LI Shangfeng,ZHAO Bin,GAO Zongting,LIU Gang,LIU Ping,CAO Ling,
,SHEN Baizhu,LI Shangfeng,ZHAO Bin,GAO Zongting,LIU Gang,LIU Ping,CAO Ling

大气科学进展 , 2013,
Abstract: This study unveils the evolution of two major early signals in the North Pacific atmosphere-ocean system that heralded abnormal high-pressure blockings and cold-vortex activities across Northeast China, based on an analysis of the configurations of major modes including the polar vortex, the North Pacific Oscillation (NPO), and SST in the preceding winter and spring and atmospheric low-frequency disturbances in Northeast China. We analyzed these aspects to understand the atmosphere-ocean physical coupling processes characterized by the two early signals, and here we explain the possible mechanisms through which dipole circulation anomalies affect the summer low-temperature processes in Northeast China. We further analyzed the interdecadal variation background and associated physical processes of the two early signals.
Interannual Variability of Autumn Precipitation over South China and its Relation to Atmospheric Circulation and SST Anomalies
NIU Ning,LI Jianping,
NIU Ning
,LI Jianping

大气科学进展 , 2008,
Abstract: The interannual variability of autumn precipitation over South China and its relationship with atmospheric circulation and SST anomalies are examined using the autumn precipitation data of 160 stations in China and the NCEP-NCAR reanalysis dataset from 1951 to 2004. Results indicate a strong interannual variability of autumn precipitation over South China and its positive correlation with the autumn western Pacific subtropical high (WPSH). In the flood years, the WPSH ridge line lies over the south of South China and the strengthened ridge over North Asia triggers cold air to move southward. Furthermore, there exists a significantly anomalous updraft and cyclone with the northward stream strengthened at 850 hPa and a positive anomaly center of meridional moisture transport strengthening the northward warm and humid water transport over South China. These display the reverse feature in drought years. The autumn precipitation interannual variability over South China correlates positively with SST in the western Pacific and North Pacific, whereas a negative correlation occurs in the South Indian Ocean in July. The time of the strongest lag-correlation coefficients between SST and autumn precipitation over South China is about two months, implying that the SST of the three ocean areas in July might be one of the predictors for autumn precipitation interannual variability over South China. Discussion about the linkage among July SSTs in the western Pacific, the autumn WPSH and autumn precipitation over South China suggests that SST anomalies might contribute to autumn precipitation through its close relation to the autumn WPSH.
Associations between the Autumn Arctic Sea Ice and North American Winter Precipitation
SONG Mi-Rong,LIU Ji-Ping,LIU Hai-Long,REN Xiao-Bo,WANG Xiu-Cheng,
SONG Mi-Rong
,LIU Ji-Ping,LIU Hai-Long,REN Xiao-Bo,WANG Xiu-Cheng

大气和海洋科学快报 , 2012,
Abstract: Associations between the autumn Arctic sea ice concentrations (SICs) and North American winter precipitation were examined using singular value decomposition. The results show that a reduced SIC in the majority of the Arctic is accompanied by dry conditions over the Great Plains, the southern United States, Mexico, eastern Alaska, and southeastern Greenland, and by wet conditions over the majority of Canada, the northeastern United States, and the majority of Greenland. Atmospheric circulation anomalies associated with the SIC variability show a wave train structure that is persistent from autumn to winter and is responsible for the covariability between the autumn Arctic SIC and North American winter precipitation. This relationship suggests a potential long-term outlook for the North American winter precipitation.
Winter wheat morphology response to cold temperature stress during autumn acclimation  [PDF]
Ligita Bale?entien?,V. Spruogis
Modern Phytomorphology , 2012,
Abstract: Winter wheat (Triticum aestivum L.) abilities depend on development during autumn acclimation. The plant ability of acclimation to low temperatures is closely associated with the photosynthesis level, leaf area index (LAI), root system development. This study investigated the effect of liquid humic fertilizers (LHF) on biometric characteristics, namely LAI, root and shoot development. The fertilizers were applied in conventional and organic growth technologies of w. wheat to adapt to the low temperatures during autumn acclimation. Winter wheat irvinta 1 was grown in different rotation fields of conventional (CF; Albi-EpihypogleyicLuvisol, LVg-p-w-ab) and organic (OF; Hapli-EpihypogleyicLuvisol, LVg-p-w-ha) farming of Training Farm at Aleksandras Stulginskis University (ASU) during 2010–2011. The obtained results confirmed the significant LHF influence on enhancing winter wheat biometrical indices and seedling growth. Nonetheless, seed felting exhibited stronger effect on LAI (increased by 0.7-1.1 g m -1 day -1 in OF and 0.25-0.7 g m -1 day -1 in CF), root length (increased by 1166 mm in OF and 1182.55 mm in CF) and area (increased by 72.45 mm 2 in OF and 588.7 mm 2 in CF) during autumn acclimation rather than seedling spraying.
Page 1 /100
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.