共查询到20条相似文献，搜索用时 62 毫秒
1.
Assessment of bioclimatic comfort conditions based on Physiologically Equivalent Temperature (PET) using the RayMan Model in Iran 总被引：3，自引：0，他引：3
Mohammad Reza Mansouri Daneshvar Ali Bagherzadeh Taghi Tavousi 《Central European Journal of Geosciences》2013,5(1):53-60
In this study thermal comfort conditions are analyzed to determine possible thermal perceptions during different months in Iran through the Physiologically Equivalent Temperature (PET). The monthly PET values produced using the RayMan Model ranged from ?7.6°C to 46.8°C. Over the winter months the thermal comfort condition (18–23°C) were concentrated in southern coastal areas along the Persian Gulf and Oman Sea. Most of the country experienced comfort conditions during the spring months, in particular in April, while during the summer months of July and August no thermal comfort conditions were observed. In November coastal areas of the Caspian Sea had the same physiological stress level of thermal comfort as April. The map produced showing mean annual PET conditions demonstrated the greatest spatial distribution of comfortable levels in the elevation range from 1000 to 2000 meter a.s.l., with annual temperatures of 12–20°C and annual precipitation of under 200 mm. The statistical relationship between PET conditions and each controlling parameter revealed a significant correlation in areas above 2000 meter, annual temperature over 20°C and annual precipitation of 200–400 mm with a correlation coefficient (R 2) of 0.91, 0.97 and 0.96, respectively. 相似文献
2.
Variations of the Effective Temperature Index (ET) in Kenya 总被引：2，自引：0，他引：2
George Lukoye Makokha 《GeoJournal》1998,44(4):337-343
Using the Effective Temperature Index (ET) as a measure of climatic comfort conditions in Kenya, this study analyses its spatial,
seasonal and diurnal variations. This index is computed using data collected from 57 weather stations spread throughout the
country. Isarithmic mapping technique and the conditioning square method are used in this analysis. The results indicate that
there exists in Kenya marked spatial, seasonal and diurnal variations of climatic comfort conditions. A classification of
the country using this index and the Terjung (1968) system of climatic classification yields six climatic comfort zones. This
type of physio-climatic studies has significant implications for Kenya in aspects such as building, clothing, recreation and
sporting.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
3.
云南丽江旅游气候舒适度分析 总被引：5，自引：0，他引：5
利用丽江1954-2009年的月气温、降水、相对湿度、风速、日照时数等影响旅游气候舒适度的气象资料, 对其进行年际、年内变化规律分析. 在计算其温湿指数THI、风效指数K和着衣指数ICL的基础上, 构建了一个新的综合气候舒适度评价模型, 分析计算了丽江市综合旅游气候舒适度, 划分出适宜于旅游的季节分布. 结果表明: 该地3-11月均较适宜旅游, 其中最佳旅游舒适期为5-9月; 2000年以来, 气温升高、风速降低、降水量减少、湿度下降的暖干趋势, 有利于吸引更多的游客, 并增加了游客在出游期间的舒适度; 冬春季节气温的升高, 使得全年中适宜旅游的时间在增加, 对旅游业发展有促进作用. 相似文献
4.
The Effective Temperature (ET), which considers the aggregate effects of temperature, relative humidity and wind speed to describe the human thermal sensitivity, was employed to investigate the change of thermal conditions over Yunnan Province in China during the period of 1961-2014. The observation data used in the study is the high resolution gridded daily scale dataset CN05.1. The results show that over the northern part of the Province with high elevation mountains, colder temperature, lower relative humidity and stronger wind speed prevail, which leads to the lower ET values there. Opposite conditions are found over the low elevation areas in the south. An overall warming and decrease of both relative humidity and wind speed are observed in the latest decades in the whole Province, resulting in the general increase of ET over the region. Analysis based on the different assessment scales of ET shows that, more cold/extreme cold days and cool days exist in the north, while the cool days and comfortable days are mainly distributed in the south. General decrease of cold/extreme cold days is found over the region. An increase of the cool days in the north and decrease of it in the south, significant increase of the comfortable days, and increase of warm and hot/extreme hot days over portions in the south are reported. More climatic favorable days are found in all of the four seasons. Within the climate change context, the significant reduction of cold/extreme cold days and increase of climatic favorable days indicate that the climate in Yunnan Province so far tends to be more favorable for the human beings. 相似文献
5.
M. Abbaspour Ph.D. M. J. Jafari N. Mansouri F. Moattar N. Nouri M. Allahyari 《International Journal of Environmental Science and Technology》2008,5(3):297-304
Underground railway systems, can generate heat from their operations to raise the temperatures of carriages and the station substantially. This may lead to passenger discomfort and complain especially in warm weather conditions that prevail in Tehran if underground environment is not cooled. Transportation air conditioning Committee of American Society of Heating, Refrigerating and air-conditioning Engineers proposed the Relative Warmth Index for thermal comfort design and investigation in subway environment. In this research, thermal comfort at Tehran metro stations and carriages of lines 1 and 2 has been studied using this index. The measurements were taken during two periods of September 2006 and July 2007 at different zones of stations. For this purpose, temperature, relative humidity and air velocity were measured at different times. The status of the air-conditioning systems together with passenger traffic was also recorded. A total number of 231 measurements including 114 and 117 measurements were carried out in September 2006 and in July 2007 respectively. The measurements in September 2006 did not exceed the thermal limit. However, it did exceed in July 2007. In comparison, with thermal comfort level of metros all over the world, Tehran Metro stands in an acceptable condition, while the maximum capacity of air-conditioning systems was not used, if so the thermal comfort condition would be better. 相似文献
6.
Gholamreza Roshan Abdolazim Ghanghermeh José Antonio Orosa 《Arabian Journal of Geosciences》2014,7(9):3657-3674
Assessing the climatic characteristics and identifying the climatic parameters of a specific region can play a major role in human welfare. Thermal comfort conditions are among the most significant factors of climatic variables in the northwestern regions of Iran due to the considerable spatial and temporal variations and are vital for environmental, energy and economic management. It is therefore necessary to advance our knowledge of the climatic conditions in order to provide an appropriate tool for managing climatic extremes. This requires charting of the range of clusters of the thermal comfort conditions in this region. In this study, the general atmosphere circulation model HADCM3 and the A1 scenario, downscaled by the LARS-WG model, were employed to simulate the climatic conditions in Iran during the period 2011–2040. The data obtained were compared with sampled data from six Iranian climatic stations for the 30-year period (1961–1990). In order to tabulate this comparison, six clusters per climatic station were defined based on intrinsic similarity of data. Results show an increase in the annual average temperature of these six stations by 1.69 °C for the predicted years, projected from the base years 1961–1990. This factor has resulted in an increment of the annual average thermal comfort temperature inside buildings by a magnitude of 0.52 °C in future decades. When the thermal requirements of the studied region were evaluated based on the real temperature difference and the degree of thermal comfort, it becomes clear that apart from cluster 1, the energy required to reach thermal comfort inside buildings will increase in the future. As a result of this temperature increase, an increase of the energy required to reach the thermal comfort is expected. This new methodology is an interesting tool and needs to be seriously considered by engineers and architects in designing buildings of the future. 相似文献
7.
Gh. R. Roshan F. Ranjbar J. A. Orosa Ph.D. 《International Journal of Environmental Science and Technology》2010,7(3):571-580
In the coming decades, global warming and increase in temperature, in different regions of the world, may change indoor and outdoor thermal comfort conditions and human health. The aim of this research was to study the effects of global warming on thermal comfort conditions in indoor ambiences in Iran. To study the increase in temperature, model for assessment of greenhouse-gas induced climate change scenario generator compound model has been used together with four scenarios and to estimate thermal comfort conditions, adaptive model of the American Society of Heating, Refrigerating and Air-conditioning Engineers has been used. In this study, Iran was divided into 30 zones, outdoor conditions were obtained using meteorological data of 80 climatological stations and changes in neutral comfort conditions in 2025, 2050, 2075 and 2100 were predicted. In accordance with each scenario, findings from this study showed that temperature in the 30 zones will increase by 2100 to between 3.4 °C and 5.6 °C. In the coming decades and in the 30 studied zones, neutral comfort temperature will increase and be higher and more intense in the central and desert zones of Iran. The low increase in this temperature will be connected to the coastal areas of the Caspian and Oman Sea in southeast Iran. This increase in temperature will be followed by a change in thermal comfort and indoor energy consumption from 8.6 % to 13.1 % in air conditioning systems. As a result, passive methods as thermal inertia are proposed as a possible solution. 相似文献
8.
气候的舒适度是游客选择旅游目的地的重要影响因素之一,利用1960-2013年近54 a的研究区气象统计资料,结合地理信息系统(GIS)空间分析方法,并考虑气温垂直递减规律这一因素,分析了阿勒泰地区500 m×500 m分辨率栅格尺度的逐月温湿指数、风效指数、着衣指数及综合舒适指数,通过对4个指数所反映的舒适度和舒适期进行对比分析,发现综合舒适指数可从客观角度反映气候因素对人体感觉的综合影响,能达到较为精准的评估效果.研究表明:阿勒泰旅游气候舒适度变化受当地地形和季节变化的影响较大,旅游舒适度季节变化明显,适宜户外旅游的舒适期短暂.季节变化中,冬季不适宜开展户外旅游活动;春季阿尔泰山山区气候舒适度不舒适,山区以南和西南萨吾尔山以北舒适度较不舒适;夏季分布在额尔齐斯河以北的山麓和山间河谷地区,以及青河县中部和南部,富蕴县南部地区人体感觉舒适,占全区总面积的39.62%,其余大部分区域较舒适;秋季分布在哈巴河县、布尔津县、阿勒泰市南部及福海县中部和南部区域感觉较舒适,占全区总面积的36.79%.阿勒泰地区旅游舒适期为1~5个月,旅游资源的空间分布契合该地区旅游舒适期的区域空间分布,利于本地区进行旅游开发和旅游活动. 相似文献
9.
空气湿度是重要的气象要素，与气温和降水密切相关，其长期变化特征是气候系统变化的重要表征。2003年前后全国自动站与人工站的更替使得相对湿度资料存在不能满足均一性的要求，亟需加强空气湿度变化特征方面研究。利用1961—2010年中国824个气象站订正后均一性较好的逐日气温、降水量和相对湿度数据，剔除缺测多的站点，采用线性回归分析、Mann-Kendall趋势检验和偏相关分析方法，综合分析中国水汽压和相对湿度的长期变化特征及其与气温和降水量的相关特征。结果表明:①全国各地年均水汽压呈增大趋势的站点占全部站点的90.3%；除春夏两季的黄土高原至云贵高原一带和长江下游地区、秋季的华南地区有所减小外，各季节全国水汽压普遍呈增大趋势。②全国年均相对湿度呈减小趋势的站点占64.1%；除河北北部至辽宁北部、陕西南部至黄淮地区、江南北部、青藏高原和四川西部地区以及西北大部呈增大趋势外，其余地区普遍减小；季节差异明显，春、夏和秋季，中东部大部分地区相对湿度以减小趋势为主；冬季除东北地区和云南减小外，其余大部分地区相对湿度增大。③全国各地水汽压与气温、降水量普遍以正相关为主，与气温的相关性强于与降水量的相关性；相对湿度与气温普遍呈显著的负相关，与降水量普遍以正相关为主。 相似文献
10.
空气湿度是重要的气象要素，与气温和降水密切相关，其长期变化特征是气候系统变化的重要表征。2003年前后全国自动站与人工站的更替使得相对湿度资料存在不能满足均一性的要求，亟需加强空气湿度变化特征方面研究。利用1961—2010年中国824个气象站订正后均一性较好的逐日气温、降水量和相对湿度数据，剔除缺测多的站点，采用线性回归分析、Mann-Kendall趋势检验和偏相关分析方法，综合分析中国水汽压和相对湿度的长期变化特征及其与气温和降水量的相关特征。结果表明：①全国各地年均水汽压呈增大趋势的站点占全部站点的90.3%；除春夏两季的黄土高原至云贵高原一带和长江下游地区、秋季的华南地区有所减小外，各季节全国水汽压普遍呈增大趋势。②全国年均相对湿度呈减小趋势的站点占64.1%；除河北北部至辽宁北部、陕西南部至黄淮地区、江南北部、青藏高原和四川西部地区以及西北大部呈增大趋势外，其余地区普遍减小；季节差异明显，春、夏和秋季，中东部大部分地区相对湿度以减小趋势为主；冬季除东北地区和云南减小外，其余大部分地区相对湿度增大。③全国各地水汽压与气温、降水量普遍以正相关为主，与气温的相关性强于与降水量的相关性；相对湿度与气温普遍呈显著的负相关，与降水量普遍以正相关为主。 相似文献
11.
京津冀地区城市人居环境气候舒适性评价 总被引：4，自引：0，他引：4
京津冀地区城市聚集,目前在京津冀协同发展规划下,随着都市圈产业结构调整,各城市面临大量人口流动迁移,人居环境气候舒适性将影响人口重布。以京津冀地区13个主要城市作为研究对象,根据1951-2013年的气候资料,采用温湿指数THI和风效指数K,综合评价各城市气候舒适度,并加以对比分析。结果表明：近63 a来,本区13个城市人居气候环境舒适性较高;区内各城市气候舒适性分布特点表现为由东北向西南,舒适性呈现降低趋势,河北省内秦皇岛、唐山、廊坊、邯郸等多个城市气候舒适性均高于北京天津两大城市。以全年气候舒适程度由高到低排序：秦皇岛>唐山>廊坊、邯郸、北京 > 承德 > 张家口 > 石家庄、邢台、保定、衡水 > 沧州、天津。这将成为引导人口分流的有利因素,驱动人口高度密集区进行有序合理疏散,缓解北京天津的大城市病问题。 相似文献
12.
The snow cover days were extracted out of the snow data on depth distribution from 1979 to 2016 in China, combined with temperature, precipitation, humidity, sunlight and wind speed and other meteorological data, by taking advantage of traditional statistical methods and GIS spatial analysis methods, to study the temporal and spatial variation characteristics of snow cover days in northeast China region in the past 40 years, and to analyze their relationship with climatic factors. It turned out that the average annual snow cover days were 93 d in northeast China region, having an increasing trend, the rate was 0.6 d/10a, and the maximum average annual snow cover days appeared in 2013. Snow cover days in spring dominate the changes of the average snow days all year around. The snow cover days in northeast China region were affected by latitude, geography and land-sea thermal difference, which gradually decreased from north to south, and the maximum value appeared in the Da Hinggan area. Precipitation, humidity and snow cover days are positive correlation, and temperature, wind speed and sunlight are negative correlation. The correlation between climatic elements and snow cover days is as follows: temperature>humidity>wind speed>sunlight>precipitation. The influence of climatic elements on the seasonally frozen ground region is more significant than that in the permafrost region. The results show that temperature is the main factor that affects the average annual snow cover days in northeast China region. 相似文献
13.
基于数字高程模型(DEM)和3S技术,以广西壮族自治区1981-2010年74个气象观测点的气象常规观测数据为基础,对广西各地区地形下温度、相对湿度、风速、温湿指数、风寒指数、着衣指数和综合旅游舒适度指数等时空分布特征进行分析研究,并结合2015年广西307个2A级旅游景区时空分布进行评价,结果表明:在时间差异上,广西大部分地区最佳旅游时间为1月、2月、3月、10月和11月,此时全区大部分地区气温保持在15~25 ℃之间,处于非雨季期;4月、12月在气候舒适上为较适合旅游的季节;由于广西地处南疆,雨热同期,高温多雨的6、7、8月在气候舒适度上为最不适合旅游月份;就季节而言,旅游气候舒适度排序为冬季＞秋季＞春节＞夏季。在空间差异上,6个月旅游舒适期地区仅占广西面积的0.12%,仅在桂西西林县西面和桂北资源县北面零星分布,没有2A级以上旅游景区分布其中;7个月旅游舒适期地区主要分布在桂西、桂西南和桂西北地区,桂北资源县、桂南博白县和合浦县、桂南贺州市、梧州市均有分布,占广西面积的36.78%,共有72个2A级旅游景区分布其中,占23.5%的景区数量比例;舒适期为8个月的地区分布最广,占广西区面积的63.1%,共有235个2A级以上旅游景区,占2015年2A级以上景区数量的76.5%,主要分布在桂中、桂南和桂北地区。 相似文献
14.
15.
2001—2019年横断山区积雪时空变化及其影响因素分析 总被引：1，自引：0，他引：1
基于MOD10A2积雪产品提取横断山区积雪日数及积雪覆盖率等信息,结合横断山区129个地面气象站点的气象数据,采用趋势分析、相关分析及随机森林回归模型等方法分析了横断山区积雪时空分布特征及其影响因素。结果表明：年平均积雪覆盖率的年际变化呈不显著的下降趋势;年内变化呈“单峰”型曲线,其中3月积雪覆盖率最大,为55.04%。海拔3 000 m以上的积雪覆盖率较为稳定,海拔1 000~3 000 m之间的积雪覆盖率波动较大。受暖湿气流和地形影响,阴坡积雪覆盖率大于阳坡。横断山区积雪日数的分布具有纬度地带性,北部山区积雪分布广泛且积雪日数高,南部云贵高原积雪日数低。年均积雪日数介于55.16~79.47 d,积雪日数在28.46%的地区呈减少趋势,在21.66%的地区呈增加趋势,其中呈显著减少和显著增加的地区分别为2.65%和0.68%。中部康定市、九龙县及其周边地区减少趋势明显,北部杂多县—若尔盖县一线的高海拔山地增加趋势明显。积雪日数整体上与降水量、相对湿度呈正相关,与风速、气温和日照时数呈负相关。与降水量呈显著正相关的地区主要分布在西北部杂多县、称多县;与风速呈显著负相关的地区主要分布在西北部称多县、中部康定市;与气温呈显著负相关的地区主要分布在中部九龙县、西北部称多县;与相对湿度呈显著正相关的地区主要分布在北部杂多县—石渠县一线;与日照时数呈显著负相关的地区主要分布在东北部玛曲县、西北部称多县。积雪日数受气温和高程的影响最大,而日照时数和风速为次要因素。 相似文献
16.
玛纳斯河流域气候干燥、蒸发强烈,准确估算蒸散发量对地下水资源评价及生态环境保护具有重要指导意义。以往蒸散发研究空间分辨率较低,已不能满足各水文地质分区景观格局演变引起的蒸散发细部变化研究,针对以往不足,文章基于SEBAL模型利用Landsat系列影像估算了近30年来玛纳斯河流域山前平原区蒸散发,并进一步探讨不同水文地质分区蒸散发时空分布特征及影响因素。结果表明,蒸散量空间分布按照水文地质分区呈现明显带状性,各水文地质分区日蒸散总量表现为戈壁带<荒漠带<绿洲带,时间尺度上全区蒸散总量呈上升趋势,且增大幅度逐渐变缓,各分区呈现绿洲带蒸散总量递增、戈壁带及荒漠带蒸散总量先减小后增大,各分区蒸散总量变化趋势是由各分区主地物类型蒸散量变化控制;通过对影响因素的分析可知日蒸散发量随气温的升高而升高,各地物日均蒸散发量与全区平均气温变化趋势一致;归一化植被指数与日蒸散发量在戈壁带与绿洲带呈现较好的正相关关系;地下水位埋深与日蒸散发量在绿洲带呈负相关,当地下水位埋深大于5. 5 m时,日蒸散发量趋于稳定。 相似文献
17.
气象驱动数据质量是影响流域水文过程模拟精度的一个重要因素。基于新疆额尔齐斯河流域及周边区域8个气象站记录的数据,对ERA-Interim再分析资料和中国区域地面气象要素驱动数据集（CMFD）在流域的适用性进行了评价,并对比了ERA-Interim和CMFD气象要素年均值在流域的空间分布。结果表明：ERA-Interim和CMFD记录气温、相对湿度、向下短波辐射和向下长波辐射数据与观测数据具有较高的一致性,但降水和风速数据与观测数据的一致性比较差。小时尺度上ERA-Interim记录的气温、相对湿度、降水量、向下短波辐射准确度略高于CMFD数据,而日尺度上CMFD记录的所有气象要素的准确度均高于ERA-Interim数据,结合Noah-MP模型的模拟结果,认为CMFD数据在新疆额尔齐斯河流域的适用性整体优于ERA-Interim数据。从两种驱动数据获取的流域气象要素空间分布来看,ERA-Interim和CMFD获取的年平均气温、风速、相对湿度、降水量、向下长波辐射在流域空间具有高度一致性,但向下短波辐射空间分布差别较大。 相似文献
18.
潜在蒸散量（PET）是干旱监测评价的重要指标,分析影响潜在蒸散发的气候敏感因子对揭示气候变化的水文响应机理尤为重要。常采用的局部敏感性方法不适用于非线性模型且难以评估各气象因子间的相互作用。对此,基于1964—2018年西北旱区内163个气象站的监测数据,通过Penman-Monteith公式,采用Sobol全局敏感性方法分析了西北旱区潜在蒸散发的气候敏感因子,计算得到了自校准帕默尔干旱指数（scPDSI）,进而分析了区域干旱的时空演变特征。结果表明:1964—2018年西北旱区年均潜在蒸散量为1157.8 mm,高值出现在新疆东部与内蒙古西部地区,低值出现在青海南部地区。1993年为转折点,西北旱区潜在蒸散发受气温、日照时数、风速、相对湿度等多种因素综合影响由显著下降的趋势转变为显著上升,且在夏季最为明显。在1964—1993年,净辐射、风速与相对湿度的变化对潜在蒸散发的影响较大;在1994—2018年,风速与相对湿度的变化对潜在蒸散发的影响较大。scPDSI的时空分布表明新疆北部、青海中部以及甘肃境内的干旱有缓解的趋势;而黄河流域西南部干旱呈现加重趋势,将加剧区域水资源紧张,威胁生态安全。 相似文献
19.
Jehad Mahmoud Hussein Ighbareyeh Eusebio Cano Carmona Ana Cano Ortiz Asma Abdel-Rahim Ahmed Suliemieh Mohammed Mahmoud Hussein Ighbareyeh Abed Al-Qader Mohammed Daraweesh 《Arabian Journal of Geosciences》2018,11(21):683
For the 1993–2009 period, we analyzed the relationship between almond yield and three climatic variables (mean annual temperature, soil water reserve, and precipitation), and four bioclimatic variables (annual ombrothermic index, water deficit, simple continentality index, and compensated thermicity index), for one major Hebron crop (soft and hard almonds). Moreover, we obtained data almond production from the Palestinian Central Bureau of Statistics, while the climate data from the Palestinian meteorological station during the study period from 1993 to 2009, and analysis is it by using bioclimatic classification of the Earth of Salvador Rivas-Martinez to study the relationship between the almond yield and climate and bioclimate factors (variables). The climatic and bioclimate variables of greatest importance to almond were used to develop regressions analysis relating yield to climatic conditions. Hebron was positively affected by annual ombrothermic index, simple continentality index, precipitation, water soil reserve, and mean annual temperature, but negatively affected by water deficit, with a large proportion of the variance explained by axis F1 (72.48%), F2 (22.38%), and axes F1and F2 (94. 86%). However, in order to produce a high amount of almonds and quality, it can be grown in the regions of the mesomediterranean region, with the value of annual ombrothemic index more than 3, compensated thermicity index between 220/220 to 350/350, simple continentality index between 14 and 20, and in areas where the average annual temperature is between 15 and 20 °C. 相似文献
20.
未来气候变化对中国荒漠化的潜在影响 总被引：40，自引：0，他引：40
气候变化与荒漠化间的反馈机制已成为全球研究的重点问题之一 ,减缓温室气体增加与防治荒漠化也成为全球协同行动的领域。作为一个发展中国家 ,中国的荒漠化及其防治不仅影响到全球气候变化 ,同时气候变化对中国的荒漠化也会产生显著影响。文中采用全国 1914个气象站的数据作为基线数据 ,在根据植被区划图在青藏高原上对Thornthwaite方程做适当订正的基础上 ,选择未来两个具代表性的年份 (2 0 30年和 2 0 5 6年 )用HadCM 2模型来预测全球变化框架下中国未来荒漠化生物气候类型区的变化。结果表明 ,各生物气候类型区的面积基本上均呈增加的趋势 ,其中以亚湿润干旱区增加为主 ,半干旱区次之。与 1990年的 395 6 5 81万km2 的荒漠化生物气候类型区面积相比 ,在GHGs年增量为 1%且考虑硫酸盐溶胶影响的情况下 ,2 0 30年和 2 0 5 6年分别提高了 11 33%和12 94% ,而在GHGs年增量为 0 5 %且考虑硫酸盐溶胶影响的情况下 ,则分别提高了 3 75 %和6 95 % ,比前者分别减少了 7 5 8和 5 99个百分点。虽然在GHGs年增量 0 5 %的减少情况下 ,中国未来荒漠化生物气候类型区面积扩大和程度加剧的速度有所减缓 ,但其总体增加仍很显著。因此进一步开展气候变化与荒漠化间相互作用的研究 ,并用以指导中国的荒漠化防治工? 相似文献