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198篇 您的检索式:作者名="Mayewski"
    题名 作者 年代 出处 被引量
1近期青藏高原长江源区急剧升温的冰芯证据显示文摘长江源区作为整个青藏高原20世纪以来增温幅度较大的地区之一得到了普遍的关注.通过对2005年在各拉丹冬峰北部果曲冰川平坦的粒雪盆(33.58°N,91.18°E,5720ma.s.l.)钻取的1支冰芯多参数的定年,获得了长江源地区近70a来大气降水中δ18O的历史记录.利用各拉丹冬冰芯δ18O与该区域气象台站夏季气温(7~9月)之间显著的正相关性,恢复了近70a来各拉丹冬地区夏季气温的变化历史:1940s气温较低,1950s^1960s中期气温较高,1970s中期气温下降到近70a来的最低值,1980s仍然处在一个低温期,而1990s以来气温急剧升高的趋势延续到了21世纪初期.各拉丹冬冰芯恢复的气温记录在1970s以来的增温率(0.5℃/10a)要明显的高于各拉丹冬地区和北半球,而1990s以来的增温率(1.1℃/10a)约为1970s以来的2倍,表明近期的增温有加速趋势且高海拔区域对全球变暖的响应更为敏感.康世昌 张拥军 秦大河 任贾文 张强弓 Bjorn Grigholm Paul Mayewski 2007科学通报2007,52,4:36
2Recent temperature increase recorded in an ice core in the source region of Yangtze River显示文摘Interests on climate change in the source region of Yangtze River have been raised since it is a region with the greatest warming over the Tibetan Plateau (TP). A 70-year history of precipitation δ^(18)O has been recovered using an ice core record retrieved in a plat portion of the firn area in the Guoqu Glacier (33°34′37.8″N, 91°10′35.3″E, 5720 m a.s.l.), Mt. Geladaindong (the source region of Yangtze River), in November, 2005. By using a significant positive relationship between ice core δ^(18)O record and summer air temperature (July to September) from the nearby meteorological stations, a history of summer air temperature has been reconstructed for the last 70 years. Summer temperature was relatively low in 1940s and high in 1950s to the middle of 1960s. The lowest temperature occurred in the middle of 1970s. Temperature was low in 1980s and dramatically increased since 1990s, keeping the trend to the begin-ning of the 21st century. The warming rate recorded in the ice core with 0.5℃/10 a since 1970s is much higher that that in the central TP and the Northern Hemisphere (NH), and it becomes 1.1℃/10 a since 1990s which is also higher than these from the central TP and the NH, reflecting an accelerated warm-ing and a more sensitive response to global warming in the high elevation region.KANG ShiChang ZHANG YongJun QIN DaHe REN JiaWen ZHANG QiangGong Bjorn GRIGHOLM Paul A. MAYEWSKI 2007Chinese Science Bulletin2007,52,6:27
3近200a来珠穆朗玛峰北坡远东绒布冰芯气候记录显示文摘1997年 5月中美联合珠穆朗玛峰地区绒布冰川考察期间,在远东绒布冰川海拔 6 500 m的北 支冰流粒雪盆内钻取到一支41m长冰芯.通过数年层法并根据β活化度的参照年(1954年和 1963 年),对远东绒布冰芯实施定年,冰芯底部为 1814年,冰芯年平均净积累量为 224 mm(冰当 量).根据远东绒布冰芯 (δ18O的变化,重建了珠穆朗玛峰北坡地区近 200 a气候变化,发现有 5次冷 期和5次暖期,且总趋势为变暖,这与本世纪北半球气候变暖的趋势相一致.远东绒布冰芯气候记 录同古里雅冰芯比较,两者的冷暖波动较为一致,说明青藏高原西北部和南部地区的气候变化具有 共性.但是,远东绒布冰芯中δ18O的变化在短时间尺度上与降水量变化存在某些反相关性,这种关 系并未影响到δ18O反映气温的长期变化趋势.康世昌 秦大河 Paul A. Mayewski Cameron P. Wake 任贾文 2000冰川冻土2000,22,3:17
4青藏高原各拉丹冬冰芯记录的季节气温变化显示文摘2005年10-11月中美联合考察队在各拉丹冬峰北部果曲冰川平坦的粒雪盆(33o34'37.8'N,91o10'35.3'E,5720m a.s.l.)钻取了一支冰芯,通过对该冰芯进行多参数定年,恢复了青藏高原中部各拉丹冬地区近70年来降水中δ18O的变化历史。根据冰芯中季风期和非季风期δ18O值与临近气象台站气温的正相关性,重建了该地区70年来的春季和夏季的气温变化。结果表明,各拉丹冬冰芯中δ18O记录的春季和夏季升温趋势非常明显;根据回归分析,冰芯中非季风期的δ18O每增大(或减小)1‰相当于春季气温升高(或降低)1.3oC;季风期的δ18O每增大(或减小)1‰相当于夏季气温升高(或降低)0.4oC;各拉丹冬冰芯中δ18O记录恢复的春季和夏季气温与北半球春季和夏季的气温变化具有一致的趋势,但各拉丹冬地区的增温幅度比北半球要大,同时春季的增温幅度也高于夏季。张拥军 康世昌 秦大河 任贾文 张玉兰 Bjorn Grigholm Paul Mayewski 2007地理学报2007,62,5:6
5青藏高原各拉丹冬冰芯年积累量变化及其与大气环流的关系显示文摘根据各拉丹冬冰芯重建了该地区近70a来积累量的时间序列.冰芯积累量与邻近区域气象台站的降水量存在显著的正相关性,表明冰芯积累量可以作为该地区降水量的代用指标.1930s中期至1960s初期,各拉丹冬地区的降水量处于一个低值期,并于1950s末期达到了极低值.自1960s开始,降水量急剧上升,进入1990s后,降水量有下降趋势,但仍然高于1930s^1950s.利用Mann-Kendall方法检测出该地区降水量在1967年发生了一次突变,即由低降水期转为高降水期.大气环流特征的分析表明,高降水期的西南夏季风比低降水期北扩了约2个纬度,且巴尔喀什湖槽在高降水期明显增强,同时经向风和水汽输送在高降水期也显著增强.张拥军 康世昌 秦大河 GRIGHOLM Bjorn MAYEWSKI Paul A 2007科学通报2007,52,20:4
6Climatic significance of d^(18)O records from an 80.36 m ice core in the East Rongbuk Glacier,Mount Qomolangma(Everest)显示文摘The δ18O variations in an 80.36 m ice core retrieved in the accumulation zone of the East Rongbuk Glacier, Mount Qomolangma (Everest), is not consistent with changes of air temperature from both southern and northern slopes of Himalayas, as well as these of the temperature anomalies over the Northern Hemisphere. The negative relationship between the δ18O and the net accumulation records of the ice core suggests the 'amount effect' of summer precipitation on the δ18O values in the region. Therefore, the δ18O records of the East Rongbuk ice core should be a proxy of Indian Summer Monsoon intensity, which shows lower δ18O values during strong monsoon phases and higher values during weak phases.Paul A. Mayewski 2005Science China Earth Sciences2005,48,2:4
7Influencing domain of peripheral sources in the urban heavy pollution process of Beijing显示文摘The effect of city’s peripheral pollution sources is one of the key issues urgent to be solved in the decision-making of Beijing’s environmental pollution control. This paper comprehensively analyses the surface observations, and the satellite remote sensing data of Moderate Resolution Imaging Spectroradiometer (MODIS) and Total Ozone Mapping Spectrometer (TOMS) during the Beijing City Atmospheric Pollution Experiment (BECAPEX) from January to March, 2001, presents an 'upstream' wind field resultant vector method for tracing peripheral pollution sources, and finds that the features of the urban heavy pollution processes of Beijing are significantly correlated with the impact of the emission sources of southern peripheral cities, and the pollutants transferred northwards from distant upstream sources are retarded by the U-shaped 'Valley' topography in Beijing’s periphery. The two factors are responsible for the formation of the S-N zonal influencing domain of pollutants from the southern peripheral areas to Beijing. The paper also comprehensively analyses the features of flow field in the heavy pollution process in the Beijing region, and compares the heavy pollution process with samples of good air-quality days from January to March, 2001. The experiment of Hybrid Single-Particle Lagrangian Integrated Trajectory model (HYSPLIT-4) further reveals the diffusion trajectory of pollutants of the cities in Hebei and Shandong provinces and Tianjin city in the heavy pollution process of Beijing, and the simulations of the Regional Atmosphere Model System (RAMS) confirm the possible contribution of peripheral sources to the exceptionally heavy pollution process of the urban area of Beijing, thus revealing that the input of pollutants from southern peripheral cities is one of the important factors responsible for aggravating urban heavy pollution processes.KANG Shichang Paul A. Mayewski 2005Science China Earth Sciences2005,48,4:3
8Changes in annual accumulation retrieved from Geladaindong ice core and its relationship to atmospheric circulation over the Tibetan Plateau显示文摘Annual accumulation records covering 1935 to 2004 were reconstructed using Geladaindong ice core in the source of Yangtze River. A significant positive correlation between annual accumulation and precipitation from nearby meteorological stations was found, suggesting ice core accumulation could be taken as a precipitation proxy in the region. In the past 70 years, precipitation in the Geladaindong region was low from 1930s to early 1960s, and the lowest value occurred in the later 1950s. Since 1960s, precipitation increased dramatically and reached the maximum around 1980s, then decreased slightly in 1990s. By using Mann-Kendall rank statistical test method, a change point for precipitation was de- termined in 1967. Analysis of the atmospheric circulation over the Tibetan Plateau suggested that, compared with the southwest wind during the low precipitation period (before 1967), it extended about 2 latitudes northward during high precipitation period (after 1967). Moreover, during the high precipita- tion, the trough over the Bal Karshi Lake was also enhanced, and both the meridional wind and vapor transporting displayed a remarkable aggrandizement.ZHANG YongJun KANG ShiChang QIN DaHe GRIGHOLM Bjorn MAYEWSKI Paul A. 2007Chinese Science Bulletin2007,52,23:2
9Iron in the NEEM ice core relative to Asian loess records over the last glacial–interglacial cycle显示文摘Mineral dust can indirectly affect the climate by supplying bioavailable iron(Fe)to the ocean.Here,we present the records of dissolved Fe(DFe)and total Fe(TDFe)in North Greenland Eemian Ice Drilling(NEEM)ice core over the past 110 kyr BP.The Fe records are significantly negatively correlated with the carbon-dioxide(CO_(2))concentrations during cold periods.The results suggest that the changes in Fe fluxes over the past 110 kyr BP in the NEEM ice core are consistent with those in Chinese loess records because the mineral-dust distribution is controlled by the East Asian deserts.Furthermore,the variations in the dust input on a global scale are most likely driven by changes in solar radiation during the last glacial–interglacial cycle in response to Earth’s orbital cycles.In the last glacial–interglacial cycle,the DFe/TDFe ratios were higher during the warm periods(following the post-Industrial Revolution and during the Holocene and last interglacial period)than during the main cold period(i.e.the last glacial maximum(LGM)),indicating that the aeolian input of iron and the iron fertilization effect on the oceans have a non-linear relationship during different periods.Although the burning of biomass aerosols has released large amounts of DFe since the Industrial Revolution,no significant responses are observed in the DFe and TDFe variations during this period,indicating that severe anthropogenic contamination has no significant effect on the DFe(TDFe)release in the NEEM ice core.Cunde Xiao Zhiheng Du Mike J Handley Paul A Mayewski Junji Cao Simon Schüpbach Tong Zhang Jean-Robert Petit Chuanjin Li Yeongcheol Han Yuefang Li Jiawen Ren 2021National Science Review2021,8,7:2
10Complexity ofholocene climate as reconstructed from a greenland ice core显示文摘O’Brien S R Mayewski P A Meeker L D 1995Science1995,270,:1
11Holocene climatevariability显示文摘Paul A Mayewski Eelco E 2004Quaternary Research2004,62,:1
12Holocene climatic instability: A prominent, widespread event 8 200 yr ago显示文摘Alley R B Mayewski P A Sowers T 1997Geology1997,25,:1
13Application of test selection and interpretation显示文摘Griner P F Mayewski R J Mushlim A I 1981Ann Intem Med1981,94,:1
14Complexity of Holocene climate as reconstructed from a Greenland ice core显示文摘O'Brien S R Mayewski P A Meeker L D 1995Science1995,270,:1
15Himalayan and Trans-Himalayan Glacier Fluctuations since AD 1812显示文摘MAYEWSKI P A JESCHKE P A 1979Arctic and Alpine Research1979,11,3:1
16Modem eolian dust deposition in central Asia 显示文摘Wake C P Mayewski P A Li Z Q 1994Tellus B1994,46,:1
17Chemical composition of a high altitude fresh snowfall in the Ladakh Himalayas显示文摘Mayewski P A Lyons W B Ahmad N 1983Geophys- ical Research Letters1983,10,:1
18Staple-isotopic composition of precipitation over the northern slope of the central Himalaya 显示文摘Kang S C Kreut K J Mayewski P A 2002Journal of Glaciology2002,48,163:1
19Holocene climate variability显示文摘MAYEWSKI P A ROHLING E E CURT STAGER J 2004Quaternary Research2004,62,:1
20Holocene climate variability显示文摘Mayewski P A Rohling E E Stager J C 2004Quaternary Research2004,62,3:1
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