检索结果-南通市图书馆

Accurate Shortwave Radiation Simulation with a Two-Layer Aerosol Model in Xinjiang Region

Journal of meteorological Research 2024年第1期38卷 69-87页

作者： Guan HUANG Yonghang CHEN Qiong LIU Pengtao WANG Qianshan HE Qing HE Shuai LI Weiling SHAO Ting FAN School of Tourism&Research Institute of Human Geography Xi’an International Studies UniversityXi’an 710128 Center for Silk Road and Eurasian Civilization Studies Xi’an International Studies UniversityXi’an 710128 College of Environmental Science and Engineering Donghua UniversityShanghai 201620 Shanghai meteorological Service Shanghai 200030 Shanghai Key Laboratory of meteorology and Health Shanghai 200030 taklimakan desert meteorology field experiment station of china meteorological administration Institute of Desert MeteorologyUrumqi 830002 Xinjiang Climate Centre Xinjiang Meteorological ServiceUrumqi 830002

To harness the rich solar energy resources in Xinjiang Region of Northwest china,this study tries to address the issue of lack of downward surface shortwave radiation(DSSR)observations and the need to improve the accuracy of satellite retrieval and numerical simulation of DSSR under varied sky and meteorological conditions.(1)A two-layer aerosol model specific to Xinjiang was developed to capture the vertical distributions of aerosols based on multiple data sources including lidar,GPS sounding,ground meteorological observations,and profiles from the ECMWF reanalysis version 5(ERA5)*** results show that the ERA5/PBLH(planetary boundary layer height)and ERA5/ALH(aerosol layer height)could be used to establish the two-layer aerosol model and characterize the vertical distribution of aerosols in Xinjiang Region.(2)Using the Santa Barbara Discrete Atmospheric Radiative Transfer(SBDART)model,a localized inverse model of clear-sky DSSR was *** parameter adjustment and using the optimal combination of input parameters for DSSR simulation together with the two-layer aerosol model,the model-simulated DSSR(DSSRSBD)under clear-sky conditions improved significantly compared to the initial results,with all fitting indices greatly improved.(3)In addition,the study demonstrated that the impact of the two-layer aerosol model on DSSR was more pronounced under dust conditions than clear-sky conditions.(4)Using the localized clear-sky DSSR inversion model and its required parameters,simulations were also conducted to capture the spatiotemporal distribution of DSSR under clear-sky conditions in Xinjiang from 2017 to *** annual average DSSR_(SBD)under clear-sky conditions in Xinjiang during 2017–2019 was 606.78 W m^(-2),while DSSR from CERES(DSSR_(CER))under the same conditions was generally higher(703.95 W m^(-2)).(5)It is found that satellite remote sensing products experienced data loss in high-altitude snow areas,where numerical simulation technology could ser

关键词： downward surface shortwave radiation(DSSR) aerosol vertical distribution Clouds and the Earth’s Radiant Energy System(CERES) Santa Barbara Discrete Atmospheric Radiative Transfer(SBDART) Xinjiang

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Size distribution of PM_(20) observed to the north of the Tibetan Plateau

引用

Journal of Mountain Science 2021年第2期18卷 367-376页

作者： ZHOU Cheng-long YANG Fan HUO Wen MAMTIMIN Ali YANG Xing-hua Institute of desert meteorology China Meteorological AdministrationUrumqi 830002China taklimakan desert meteorology field experiment station China Meteorological AdministrationUrumqi 830002China

The size distribution of airborne dust particles is an important parameter in the measurement of dust emissions due to wind erosion,and a quantitative and accurate description is *** regarding the size distribution of airborne dust particles are currently lacking in Tibetan Plateau(TP).This study aims to obtain a dust particle size distribution and compare the difference in spatial distribution at a field site(FS)and two urban observation sites(Minfeng and Hetian),in the north of the TP,under the condition of the dust-days and *** observation data was collected from 5 July to 4 August,*** mass concentration of dust(PM20)was measured with a 10-stage quartz crystal microbalance cascade *** results suggested that 91.9%of the particles were less than 1.4μm on clear-days,and particles of d≥1.4μm increased to 27.2%with the occurrence of the dust *** than 80%of the airborne dust particles were less than 1.4μm for each friction *** proportion of d0.7μm was the greatest at 0.5 m on *** urban observation,with the occurrence of dust events,the concentration of a particle size greater than 2.5μm increased most significantly in Minfeng,while the concentration of a particle size less than 0.7μm increased most significantly in ***,the proportion of particles with d1.4μm had the most obvious difference among these three sites.

关键词： Dust day Clear day Friction velocity field Urban Coefficient variation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Near-surface sand-dust horizontal flux in Tazhong-the hinterland of the taklimakan desert

引用

Journal of Arid Land 2013年第2期5卷 199-206页

作者： XingHua YANG Qing HE Mamtimin ALI Wen HUO XinChun LIU Institute of desert meteorology China Meteorological Administration desert Atmosphere and Environment Observation experiment of taklimakan station

Tazhong is the hinterland and a sandstorm high-frequency area of the taklimakan desert. However, little is known about the detailed time-series of aeolian sand transport in this area. An experiment to study the sand-dust horizontal flux of near-surface was carried out in Tazhong from January to December 2009. By measur- ing the sand-dust horizontal flux throughout sixteen sand-dust weather processes with a 200-cm tall Big Spring Number Eight （BSNE） sampler tower, we quantitatively analyzed the vertical variation of the sand-dust horizontal flux. And the total sand-dust horizontal flux of different time-series that passed through a section of 100 cm in width and 200 cm in height was estimated combining the data of saltation movement continuously recorded by piezo- electric saltation sensors （Sensit）. The results indicated that, in the surface layer ranging from 0-200 cm, the inten- sity of sand-dust horizontal flux decreased with the increase of the height, and the physical quantities obeyed power function well. The total sand-dust horizontal flux of the sixteen sand-dust weather processes that passed through a section of 100 cm in width and 200 cm in height was about 2,144.9 kg, the maximum of one sand-dust weather event was about 396.3 kg, and the annual total sand-dust horizontal flux was about 3,903.2 kg. The high levels of aeolian sand transport occurred during daytime, especially from 13：00 to 16：00 in the afternoon. We try to develop a new method for estimation of the detailed time-series of aeolian sand transport.

关键词： aeolian sand transport horizontal flux saltation movement Sensit taklimakan desert

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Observation of saltation activity at Tazhong area in taklimakan desert,china

引用

Journal of Arid Land 2013年第1期5卷 32-41页

作者： Ali MAMTIMIN Institute of desert meteorology China Meteorological Administration desert Atmosphere and Environment Observation experiment of taklimakan station

A two-year field observation of saltation activity was carried out at Tazhong area, the hinterland area of the taklimakan desert with highly frequent dust storms. From 1 September 2008 to 31 August 2010, a piezoelectric saltation sensor （Sensit） was used to continuously collect the data on saltation activity at a level sand surface. Analysis on the data suggests that saltation activity can occur at any time of the year when conditions are favorable; however, the necessary conditions are rarely satisfied in most time. In the daytime of spring or summer, saltation activity can persist even over a continuous one-hour-or-so period. It is found that, from 1 September 2008 to 31 August 2010, saltation activity accounts for more than 3% of the total yearly time, and it tends to peak in spring and summer months with strong winds. During winter months when winds are weak, however, it is often at a minimum. It seems that precipitation does not appear to be significant in reducing saltation activity in arid regions like Tazhong.

关键词： saltation activity aeolian sand transport piezoelectric saltation sensor (Sensit) Tazhong taklimakan desert

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A field experiment on Dust Emission by Wind Erosion in the taklimakan desert

引用

Acta meteorologica Sinica 2012年第2期26卷 241-249页

作者：杨兴华何清艾力.买买提依明霍文刘新春 STRAKE Miriam Institute of desert meteorology China Meteorological Administration desert Atmosphere and Environment Observation experiment of taklimakan station Ruprecht Karls University of Heidelberg

Dust emission by wind erosion in surface is a serious problem in many arid regions around the world,and it is harmful to the ecological environment,human health,and social *** monitor the characteristics of saltation activity and to calculate the threshold wind velocity and sediment discharge under field conditions have significance on the research of dust emission by wind ***,a field experiment was conducted over the flat sand in the hinterland of the taklimakan *** sampling system was installed on the flat sand surface at Tazhong,consisting of a meteorological tower with a height of 2 m,a piezoelectric saltation sensor（Sensit）,and a Big Spring Number Eight（BSNE） sampler *** of saltation activity was recorded every second using the *** BSNE station consisted of five BSNE samplers with the lowest sampler at 0.05 m and the highest sampler at 1.0 m above the soil *** was collected from the samplers every 24 *** is found that saltation activity was detected for only 21.5% of the hours measured,and the longest period of saltation activity occurring continuously was not longer than 5 min under the field *** threshold wind velocity was variable,its minimum value was 4.9 m s 1,the maximum value was 9.2 m s 1,and the average value was 7.0 m s *** threshold wind velocity presented a positive linear increase during the measurement *** observation site had a sediment discharge of 82.1 kg m 1 over a period of 24 *** on hourly saltation counts,hourly sediment discharge was ***,there was no obvious linear or other functional relationship between the hourly sediment discharge and wind *** results show that the changes of sediment discharge do not quite depend on wind velocity.

关键词： wind erosion saltation activity threshold wind velocity sediment discharge taklimakan desert

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impact factors of soil wind erosion in the center of taklimakan desert

引用

Journal of Arid Land 2011年第1期3卷 9-14页

作者： Qing HE XingHua YANG Ali Mamtimin ShiHao TANG Istitute of desert meteorology China Meteorological Administration Urumqi 830002 China desert Atmosphere and Environment Observation experiment of taklimakan station Tazhong 841000 China National Satellite meteorological Center China Meteorological Administration Beijing100081 China

The development and progress of soil wind erosion are influenced by the factors of climate, terrain, soil and vegetation, etc. This paper, taking Tazhong region, a town in the centre of the taklimakan desert, as an example and using comparative and quantitative methods, discussed the effects of climate, surface roughness （including vegetation cover） and surface soil properties on soil wind erosion. The results showed that the climate factor index C of annual wind erosion is 28.3, while the maximum of C is 13.9 in summer and it is only 0.7 in winter. The value of C has a very good exponential relationship with the wind speed. In Tazhong region, the surface roughness height is relatively small with a mean of 6.32 x 10 Sm, which is in favor of soil wind erosion. The wind erosion is further enhanced by its sandy soil types, soil particle size, lacking of vegetation and low soil moisture content. The present situation of soil wind erosion is the result of concurrent effects of climate, vegetation and surface soil properties.

关键词： taklimakan desert roughness particle size soil moisture content soil wind erosion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on the Clouds Detected by a Millimeter-Wave Cloud Radar over the Hinterland of the taklimakan desert in April–June 2018

引用

Journal of meteorological Research 2021年第6期35卷 1074-1090页

作者： Hu MING Minzhong WANG Ming WEI Yinjun WANG Xiaochen HOU Mingliang GAO School of Electrical&Electronic Engineering Shandong University of TechnologyZibo 255000 taklimakan desert meteorology field experiment station of CMA Institute of Desert MeteorologyChina Meteorological Administration(CMA)Urumqi 830002 Collaborative Innovation Center on Forecast and Evaluation of meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044 State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081

This study was the first to conduct high-resolution consecutive detection of clouds over the hinterland of the taklimakan desert(TD)from April to June 2018 based on a ground-based Ka-band millimeter-wave cloud radar(MMCR),with focus on the structure and evolution of the desert *** calculated reflectivity factor(Z),cloud boundary,and liquid water content(LWC)by use of the MMCR power spectrum data,which were verified against the observations from cloud profile radar(CPR)on board Cloud *** results show that the TD clouds were mostly medium and high clouds,with thickness generally less than 2 km;moreover,the mean LWCs of these clouds were less than 0.01 gm^(-3),implying that cirrus and stratiform clouds were *** the observed low clouds,however,the average thickness was 3166 m and accompanying drizzles were concentrated within 2.5-4.5 km,indicating that precipitation was more likely to occur in the low *** mean LWC in the TD clouds was 0.0196 gm^(-3),less than that of clean *** to other periods,the average durations and LWCs in the TD clouds increased significantly around noon owing to obvious surface sensible *** average time for evolution of high clouds into low clouds was approximately 2 h,and the average maximum LWC increased from 0.008 to 0.139 gm;.The results obtained herein provide a key reference for further studies of the structure and evolution characteristics of the desert clouds.

关键词： millimeter-wave radar reflectivity factor(Z) liquid water content cloud the hinterland of the taklimakan desert

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improving the CoLM in taklimakan desert Hinterland with Accurate Key Parameters and an Appropriate Parameterization Scheme

引用

Advances in Atmospheric Sciences 2012年第2期29卷 381-390页

作者：刘永强何清张宏升艾力.买买提明 Institute of desert meteorology China Meteorological Administration College of Resources & Environmental Science Xinjiang University Key Laboratory of Oasis Ecology (Xinjiang University) Ministry of Education desert Atmosphere and Environment Observation experiment of taklimakan station Department of Atmospheric Sciences Peking University

Improving and validating land surface models based on integrated observations in deserts is one of the challenges in land modeling. Particularly, key parameters and parameterization schemes in desert regions need to be evaluated in-situ to improve the models. In this study, we calibrated the land-surface key parameters and evaluated several formulations or schemes for thermal roughness length （z 0h ） in the common land model （CoLM）. Our parameter calibration and scheme evaluation were based on the observed data during a torrid summer （29 July to 11 September 2009） over the taklimakan desert hinterland. First, the importance of the key parameters in the experiment was evaluated based on their physics principles and the significance of these key parameters were further validated using sensitivity test. Second, difference schemes （or physics-based formulas） of z 0h were adopted to simulate the variations of energy-related variables （e.g., sensible heat flux and surface skin temperature） and the simulated variations were then compared with the observed data. Third, the z 0h scheme that performed best （i.e., Y07） was then selected to replace the defaulted one （i.e., Z98）; the revised scheme and the superiority of Y07 over Z98 was further demonstrated by comparing the simulated results with the observed data. Admittedly, the revised model did a relatively poor job of simulating the diurnal variations of surface soil heat flux, and nighttime soil temperature was also underestimated, calling for further improvement of the model for desert regions.

关键词： common land model (CoLM) parameter parameterization scheme taklimakan desert

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Estimation of the Land Surface Emissivity in the Hinterland of taklimakan desert

引用

Journal of Mountain Science 2014年第6期11卷 1543-1551页

作者： LIU Yong-qiang Ali MAMTIMIN HUO Wen YANG Xing-hua LIU Xin-chun MENG Xian-yong HE Qing College of Resource & Environmental Sciences Xinjiang University Key Laboratory of Oasis Ecology (Ministry of Education) Key Laboratory of City Intellectualizing and Environment Modeling Xinjiang University Institute of desert meteorology China Meteorological Administration desert Atmosphere & Environment Observation experiment station of taklimakan

An accurate accounting of land surface emissivity(ε) is important both for the retrieval of surface temperatures and the calculation of the longwave surface energy *** ε is one of the important parameterizations in land surface models(LSMs),accurate accounting also improves the accuracy of surface temperatures and sensible heat fluxes simulated by *** order to obtain an accurate emissivity,this paper focuses on estimating ε from data collected in the hinterland of taklimakan desert by two different *** the first method,ε was derived from the surface broadband emissivity in the 8–14 μm thermal infrared atmospheric window,which was determined from spectral radiances observed by field measurements using a portable Fourier transform infrared spectrometer,the mean ε being *** second method compared the observed and calculated heat fluxes under nearneutral atmospheric stability and estimated ε indirectly by minimizing the root-mean-square difference between *** result of the second method found a mean value of 0.9042,which is consistent with the result by the first *** the two methods recover ε from different field experiments and data,the difference of meanvalues is *** first method is superior to the indirect method,and is also more convenient.

关键词：塔克拉玛干沙漠腹地辐射率地表面傅立叶变换红外光谱仪估计地表能量平衡表面温度

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Summer atmospheric boundary layer structure in the hinterland of taklimakan desert, china

引用

Journal of Arid Land 2016年第6期8卷 846-860页

作者： WANG Minzhong WEI Wenshou HE Qing YANG Yuhui FAN Lei ZHANG Jiantao Institute of desert meteorology China Meteorological Administration Urumqi 830002 China taklimakan desert Atmospheric Environment Observation experimental station Tazhong 841000 China School of Geographic Science and Tourism Xinjiang Normal University Urumqi 830054 China

Understanding the characteristics of the structure of desert atmospheric boundary layer and its land surface process is of great importance to the simulations of regional weather and climate. To investigate the atmospheric boundary layer structure and its forming mechanism of taklimakan desert, and to improve the accuracy and precision of regional weather and climate simulations, we carried out a GPS radiosonde observation experiment in the hinterland of taklimakan desert from 25 June to 3 July, 2015. Utilizing the densely observed sounding data, we analyzed the vertical structures of daytime convective boundary layer and nighttime stable boundary layer in summer over this region, and also discussed the impacts of sand-dust and precipitation events on the desert atmospheric boundary layer structure. In summer, the convective boundary layer in the hinterland of taklimakan desert developed profoundly and its maximum height could achieve 4,000 m; the stable boundary layer at nighttime was about 400-800-m thick and the residual mixing layer above it could achieve a thickness over 3,000 m. Sand-dust weather would damage the structures of nighttime stable boundary layer and daytime convective boundary layer, and the dust particle swarm can weak the solar radiation absorbed by the ground surface and further restrain the strong development of convective boundary layer in the daytime. Severe convective precipitation process can change the heat from the ground surface to the atmosphere in a very short time, and similarly can damage the structure of desert atmospheric boundary layer remarkably. Moreover, the height of atmospheric boundary layer was very low when raining. Our study verified the phenomenon that the atmospheric boundary layer with supernormal thickness exists over taklimakan desert in summer, which could provide a reference and scientific bases for the regional numerical models to better represent the desert atmospheric boundary layer structure.

关键词： convective boundary layer effects of sand-dust and precipitation GPS radiosonde observation the hinterland of taklimakan desert

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：