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| 1 | Precipitation seesaw phenomenon and its formation mechanism in the eastern and western parts of Northwest China during the flood season显示文摘Extending across three major plateaus,namely the Qinghai-Tibetan Plateau,the Inner Mongolia-Xinjiang Plateau and the Loess Plateau,Northwest China has the complex terrain and spatio-temporal climate variations,and is affected by the interactions among different circulation systems,such as the summer monsoon,the westerlies and the plateau monsoon.The understanding of the climate variability,as well as its characteristics and evolution mechanisms in this area has been limited so far.In this paper,the precipitation characteristics and mechanisms in the eastern and western parts of Northwest China during the flood season are compared and analyzed based on the data from 192 national meteorological observational sites in Northwest China in 1961-2016.The results show that,divided by the northern boundary of the East Asian summer monsoon,there are huge differences in the precipitation variation characteristics between the eastern and western parts.The inter-annual variations,interdecadal variations and total trends in the two parts all show a significant seesaw phenomenon.Moreover,it is found that the seesaw phenomenon of precipitation variation is closely related to the opposite variation between the East Asian summer monsoon index(MI)and the westerly circulation index(WI).In addition,the inverse variations on different time scales are only related to the contributions of precipitation at specific grades.Besides,in the two matching patterns of precipitation in the seesaw phenomenon,the middle and high latitudes are occupied by the'high-low-high'wave trains in the precipitation increases in the east of Northwest China(ENWC)and decreases in the west of Northwest China(WNWC)pattern,meaning precipitation increases in ENWC and decreases in WNWC.Whereas the opposite'low-high-low'wave trains at 500 hPa height are observed in the middle and high latitudes in the WH-EA pattern at 500 hPa height,meaning precipitation increases in WNWC and decreases in ENWC.Thus,the atmosphere circulation situation with two wave train types can support both the precipitation seesaw phenomenon and the opposite variation between MI and WI.Moreover,the seesaw phenomenon is shown to be related to the separate or joint effects of the South Asian High,ENSO and the plateau heating on the common but opposite effect on the summer monsoon and the westerlies,in which the South Asian High probably plays a more critical role.This study could deepen the scientific understanding of precipitation mechanisms and improve the weather forecast technology in Northwest China during the flood season. | Qiang ZHANG Jingjing LIN Weicheng LIU Lanying HAN | 2019 | Science China Earth Sciences2019，62，12： | 11 |
| 2 | The trend of sand flux and the meteorology elements changes in the near-surface layer of Tengger desert in the spring of 2006显示文摘Dust storm events,especially those associated with strong winds,are immediately dangerous,and have long-term harmful effects.During a dust storm event,dust in the near-surface atmospheric layer decreases visibility,and changes local meteorological parameters.In this paper,we analyzed levels of near-surface turbulence during and outside a dust storm event and found differences in the degree of turbulence,with wind speed increasing and amounts of windblown sand greatly increasing air turbu-lence during the dust storms compared with the corresponding values on a sunny day.In addition,the wind profile during the dust storm deviated from the normal profile and became more complex.In the near-surface atmospheric layer,sand and dust flux during the dust storm also differed from those on a sunny day. | ZHANG ZhengCai DONG ZhiBao HAN LanYing ZHAO AiGuo | 2008 | Chinese Science Bulletin2008，53，21： | 2 |
| 3 | Antimicrobial activity of mustard essential oil against Escherichia coli O157:H7 and Salmonella typhi显示文摘 | Mélanie Turgis Jaejoon Han Stéphane Caillet Monique Lacroix | 2009 | Food Control2009，，12： | 1 |
| 4 | The Arctic Sea Ice Thickness Change in CMIP6’s Historical Simulations显示文摘This study assesses sea ice thickness(SIT)from the historical run of the Coupled Model Inter-comparison Project Phase 6(CMIP6).The SIT reanalysis from the Pan-Arctic Ice Ocean Modeling and Assimilation System(PIOMAS)product is chosen as the validation reference data.Results show that most models can adequately reproduce the climatological mean,seasonal cycle,and long-term trend of Arctic Ocean SIT during 1979-2014,but significant inter-model spread exists.Differences in simulated SIT patterns among the CMIP6 models may be related to model resolution and sea ice model components.By comparing the climatological mean and trend for SIT among all models,the Arctic SIT change in different seas during 1979-2014 is evaluated.Under the scenario of historical radiative forcing,the Arctic SIT will probably exponentially decay at-18%(10 yr)-1 and plausibly reach its minimum(equilibrium)of 0.47 m since the 2070s. | Lanying CHEN Renhao WU Qi SHU Chao MIN Qinghua YANG Bo HAN | 2023 | Advances in Atmospheric Sciences2023，40，12： | 0 |
| 5 | Syntheses, Crystallographic and Magnetic Properties of Nd_3Fe_(29-x)Cr_x and Other Associated Compounds显示文摘A systematic study of syntheses and magnetic properties of the Nd3Fe29-xCrx (x=4.5, 4.7, 5.0, and 5.5) compounds has been performed. The single-phase compounds of Nd3Fe29-xCrx can be formed in the range 4.5≤ x ≤ 5.5. The Curie temperature TC, the saturation magnetization Ms at 4.2 K, the anisotropy field HA at 4.2 K and room temperature. and the intra-sublattice exchange coupling parameter jFeFe at 4.2 K for the Nd3Fe29-xCrx compounds decrease with increasing Cr composition from x=4.5 to 5.5, respectively. Nitrogenation and carbonation, unlike hydrogenation. result mainly in improvements of the Curie temperature, the saturation magnetization and the anisotropy field at 4.2 K and room temperature for the Nd3Fe29-xCrx compounds compared with their parent compounds. | Xiufeng HAN and Terunobu Miyazaki (Department of Applied Physics, Faculty of Engineering, Tohoku University, Sendai 980-77, Japan) Qiyuan WANG, Jun WANG, Yude ZAN and Lanying LIN (Material Science Center, Institute of Semiconductors, Chinese Academy of Sc | 2000 | Journal of Materials Science & Technology2000，16，3： | 0 |
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