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1近70年来中国自然地理与生存环境基础研究的重要进展与展望显示文摘自然环境是人类赖以生存和发展的基础,探索自然环境及其各要素(如地貌、气候、水文、土壤等)的特征、演变过程、地域分异规律以及驱动机制是自然地理学的重点研究内容.中国自然地理要素类型丰富且区域差异较大,为开展自然地理研究提供了难得的机遇.文章主要围绕青藏高原隆升与亚洲内陆干旱化及河流发育、高原冰冻圈环境演化、全新世多时间尺度季风与西风气候变化、湖泊与湿地、流域模型与土壤侵蚀、过去人-地关系演化、生物地理及中国三维地带性规律等几个方面,梳理了近70年来中国自然地理与生存环境研究的重大理论进展与重要贡献.在简要交代国际前沿研究进展的基础上,回顾并梳理了中国自然地理学各分支领域的研究脉络,进一步聚焦重大研究成果或具有较大争议、重大影响的学术争鸣问题,归纳目前研究现状,并进行未来工作展望.最后提出在推进生态文明建设的国家需求下,应发挥中国自然地理研究的优势,厘清自然地理要素变化的过程、规律与机制,持续推进中国自然地理研究为国家战略服务,在全球视野下做出具有中国特色的自然地理学理论贡献.陈发虎 傅伯杰 夏军 吴铎 吴绍洪 张镱锂 孙航 刘禹 方小敏 秦伯强 李新 张廷军 刘宝元 董治宝 侯书贵 田立德 徐柏青 董广辉 郑景云 杨威 王鑫 李再军 王飞 胡振波 王杰 刘建宝 陈建徽 黄伟 侯居峙 蔡秋芳 隆浩 姜明 胡亚鲜 冯晓明 莫兴国 杨晓燕 张东菊 王秀红 尹云鹤 刘晓晨 2019中国科学:地球科学2019,49,11:87
2Amplitudes, rates, periodicities and causes of temperature variations in the past 2485 years and future trends over the central-eastern Tibetan Plateau显示文摘Amplitudes, rates, periodicities, causes and future trends of temperature variations based on tree rings for the past 2485 years on the central-eastern Tibetan Plateau were analyzed. The results showed that extreme climatic events on the Plateau, such as the Medieval Warm Period, Little Ice Age and 20th Century Warming appeared synchronously with those in other places worldwide. The largest amplitude and rate of temperature change occurred during the Eastern Jin Event (343-425 AD), and not in the late 20th century. There were significant cycles of 1324 a, 800 a, 199 a, 110 a and 2-3 a in the 2485-year temperature series. The 1324 a, 800 a, 199 a and 110 a cycles are associated with solar activity, which greatly affects the Earth surface temperature. The long-term trends (>1000 a) of temperature were controlled by the millennium-scale cycle, and amplitudes were dominated by multi-century cycles. Moreover, cold intervals corresponded to sunspot minimums. The prediction indicated that the temperature will decrease in the future until to 2068 AD and then increase again.LIU YU CAI QiuFang SONG HuiMing AN ZhiSheng Hans W. LINDERHOLM 2011Chinese Science Bulletin2011,56,28:23
3甘肃南部公元1824年以来降水重建显示文摘通过对甘肃南部腊子口的油松(Pinus tabulaeformis)进行树木年轮分析,首次建立了研究区1824~2011年标准化年表(STD),并与邻近的岷县气象站降水和温度进行相关分析,结果表明,该年表与上一年8月到当年7月的总降水(p8c7)相关性最好,相关系数达到0.644(p<0.01)。据此建立树轮指数与降水量之间的转换方程,该方程解释了实测期41.5%的降水(1952~2008年),并通过一系列稳定性检验,进而重建研究区1824~2011年间188年以来的降水。对重建结果进行11年滑动平均,结果表明,共出现3次极干旱期,分别为1900~1902年,1926~1930年和1997~2000年,尤以1997~2000年最为严重,极干旱期占到重建期的6.38%,而极湿润期只有1937年,仅占0.53%。与邻近区已有的研究对比后发现,1920s^1930s干旱事件在研究区以北区域更为严重。重建结果与赤道东太平洋、中太平洋平均海表温度(SST)呈显著负相关(p<0.1),说明研究区干旱变化与海温存在遥相关关系;多窗谱分析(MTM)结果表明降水存在2~3年和7年周期。ENSO事件时,东亚季风减弱,位于季风边缘区的甘肃南部地区出现干旱化趋势。刘昶智 勾晓华 方克艳 刘文火 曹宗英 赵志千 2013第四纪研究2013,33,3:19
4A 457-year reconstruction of precipitation in the southeastern Qinghai-Tibet Plateau,China using tree-ring records显示文摘This paper presents a 457-year reconstruction of precipitation in the southeastern Qinghai-Tibet Plateau using tree-ring records.Tree-ring samples were collected from the Hengduan Mountains in the southeastern part of the Qinghai-Tibet Plateau,China.A nearly 500-year chronology was developed using tree-ring width records.Correlation analysis shows moisture is the main factor limiting tree growth in this region.Ring-widths were significantly positively correlated with the Palmer Drought Severity Index(PDSI) and precipitation in many months.The highest correlation coefficient was found between the annual growth of trees and precipitation from the previous September to the current June(0.738).Based on this relationship,we reconstructed the precipitation history from 1509 to 2006.The reconstruction explains 54.4%(Radj2=53.5%,N=49,F=56.12) of the actual precipitation variation during the calibration period(1958-2006).During the reliable period of the reconstruction(1549-2006),some low-frequency climate signals are included,indicating this region has been getting wetter in the last 20 years.The reconstruction documents six apparently dry and five pluvial periods and the 17th century dry period lasted longer than any other.When compared with other recent studies,this study and these earlier reconstructions show a similar trend in the variation of drought and pluvial.Further spatial correlation analysis confirms that the reconstructed precipitation adequately represents the rainfall history of the entire Hengduan Mountain area.The Multi-taper method,a type of spectral analysis,reveals that precipitation in this area had significant(P<0.01) spectral peaks at 3-5 a,60 a and 79-85 a.GOU XiaoHua YANG Tao GAO LinLin DENG Yang YANG MeiXue CHEN FaHu 2013Chinese Science Bulletin2013,58,10:16
5树木年轮轮宽年表建立方法研究进展显示文摘树木年轮以其高分辨率、准确定年、样本广泛分布且可定量等优点,在全球变化特别是气候变化研究中广泛运用。去除以生长趋势为主的噪音,建立包含所需气候信息的轮宽年表是开展树木年轮气候学研究的关键。基于轮宽年表建立理论和树木径向生长概念模型,本文综述了轮宽年表建立过程中生长趋势拟合、指数化和均值化3个阶段的主要理论方法的研究进展;并详细介绍了最为关键的生长趋势拟合方法中,目前较为传统的曲线拟合类方法,和近20年来为克服曲线拟合类方法低频信息保留问题而受到关注和发展的区域曲线类方法;认为如何准确提取轮宽低频气候信息,将是树木年轮轮宽年表建立的主要发展趋势。彭小梅 肖生春 肖洪浪 2013中国沙漠2013,33,3:15
6Moisture variations over the past millennium characterized by Qaidam Basin tree-ring δ^(18)O显示文摘High-resolution tree-ring δ18O chronologies covering the last millennium,although scarce,are essential in understanding patterns of climatic changes in the northeastern region of the Qinghai-Tibetan Plateau.For this study,a tree-ring δ18O chronology with a temporal resolution of 3-years was developed from the long-lived Qilian juniper(Sabina przewalskii Kom.),extending back in time to AD 991.This long δ18O chronology was significantly correlated with the yearly δ18O in tree rings during the common period from 1800 to 2006,and was an effective proxy for relative humidity during the growing season.A low-frequency moisture pattern signified the occurrence of a slight drought during the Medieval Climate Anomaly,a marked occurrence of a wet period during the Little Ice Age,and a trend in increasing moisture levels,although lower than average,alongside the Twentieth Century warming trend.Comparisons to other hydroclimatic reconstructions indicate that this tree-ring18O chronology serves as a reliable paleo-humidity proxy for the Qaidam Basin as well as documenting details of past humidity levels in the region.WANG WenZhi LIU XiaoHong XU GuoBao SHAO XueMei QIN DaHe SUN WeiZhen AN WenLing ZENG XiaoMin 2013Chinese Science Bulletin2013,58,32:14
7祁连山中部祁连圆柏年内径向生长对气候因子的响应显示文摘通过对祁连山中部葫芦沟流域的祁连圆柏连续采集微树芯,对其形成层活动和径向生长动态进行了连续两年的监测研究。结果表明,2012年细胞壁加厚和细胞成熟阶段开始时间分别发生在6月26日和7月24日,比2013年细胞壁加厚(6月22日)和细胞成熟阶段(6月26日)开始时间分别晚5 d和28 d。2012年细胞扩大、细胞壁加厚和细胞成熟阶段结束时间分别为7月16日、8月9日和9月8日,比2013年各阶段结束时间分别晚7、28 d和24 d。2012年最大细胞分裂速率为0.33细胞/d,共形成20.9个细胞,细胞分裂速率和木质部细胞总数均高于2013年。通过与附近气象站记录的气象数据进行对比,发现祁连圆柏生长开始时间在温暖年份显著早于寒冷年份,说明祁连圆柏的径向生长开始时间与温度有关。但2013年春季和夏初的高温导致区域干旱程度加剧,使祁连圆柏生长结束时间显著早于2012年,并导致2013年的木质部细胞总量和生长速率都小于2012年。研究表明,在寒冷干旱地区,尽管升温会使生长季提前,但升温导致的干旱胁迫可能对树木的生长速率和木质部细胞总量产生重要影响。金敏艳 李进军 车宗玺 王放 张军周 勾晓华 2020生态学报2020,40,21:13
8Response of water budget to recent climatic changes in the source region of the Yellow River显示文摘Discharge in the source region of the Yellow River significantly declined after 1990.China Meteorological Administration(CMA) data show that precipitation in this region was low in the 1990s but returned to above normal after 2002;in recent decades there has been rapid warming of surface air,moistening and wind speed decrease.To investigate the influences of recent climatic changes on the water budget,this study simulates the surface water budget at CMA stations within and surrounding the source region during 1960-2006,using an improved land surface model.Results indicate that the spatial pattern of precipitation change is an important factor(except for precipitation amount and intensity) in determining the response of runoff to precipitation changes.Low runoff in the 1990s was consistent with precipitation amount and intensity.The recovery of precipitation after 2002 is mainly from increased precipitation in the dry area of the source region.Evaporation was mainly limited by water availability in this dry area,and thus most of the precipitation increase was evaporated.By contrast,energy availability was a more important influence on evaporation in the wet area.There was more evaporation in the wet area because of rapid warming,although precipitation amount partly decreased and partly increased,contributing to the reduction of runoff after 2002.This control on evaporation and its response,together with the modified spatial pattern of precipitation,produced a water budget unfavorable for runoff generation in the source region during recent years.ZHOU DeGang HUANG RongHui 2012Chinese Science Bulletin2012,57,17:12
9器测和树轮资料对厄尔尼诺-南方涛动指数的响应特征显示文摘厄尔尼诺-南方涛动是影响全球年际(1~10年)气候变化最显著的海气因子,是现代气候和古气候的热点研究对象。目前有多个指数能够刻画厄尔尼诺-南方涛动特征与演化,树轮资料是重建其过去千年以来演化历史所使用的最为广泛的代用资料,然而系统对这些指数与器测温度、降水和树轮资料在不同时间尺度上关联的研究尚未开展。本文研究了东亚和北美的器测与树轮资料对6种厄尔尼诺-南方涛动指数的响应差异,发现器测和树轮资料对描述多气候变量耦合变化的多变量厄尔尼诺-南方涛动指数(MEI)的响应均最高。厄尔尼诺-南方涛动Modoki指数(EMI)与器测资料的相关偏低,但是该指数与树轮资料的相关偏高,这可能是由于该指数和树轮所关联的多个气候因子的协同变化相似。不同厄尔尼诺-南方涛动指数与东南亚和印度次大陆以及加拿大中西部的温度相关显著,在年际尺度上更明显;这些指数与中亚和美国西北部的降水的相关最显著,但在年际尺度上的相关提升不明显。厄尔尼诺-南方涛动指数除了与上述区域的树轮资料显著相关以外,该指数还与部分湿润地区(如喜马拉雅南麓)的树轮资料显著相关,这可能是这些湿热地区的树轮往往受到多个气候因子共同影响,而这些气候因子的协同变化与厄尔尼诺-南方涛动指数的关联显著。研究指出,进行厄尔尼诺一南方涛动指数重建时,不仅要考虑指数与树轮之间的关系,还需要详细建立树轮、区域气候因子和厄尔尼诺-南方涛动这三者之间的关联。方克艳 周非飞 董志鹏 刘秀铭 吴海斌 李颖俊 曹新光 郭正堂 2017第四纪研究2017,37,5:11
10Major advances in studies of the physical geography and living environment of China during the past 70 years and future prospects显示文摘The natural environment provides material essentials for human survival and development. The characteristics,processes, regional differentiation and forcing mechanisms of the elements of the natural environment(e.g. geomorphology,climate, hydrology, soil, etc.) are the main objects of research in physical geography. China has a complex natural environment and huge regional differentiation and therefore it provides outstanding reserach opportunities in physical geography. This review summarizes the most important developments and the main contributions of research in the physical geography and human living environment in China during the past 70 years. The major topics addressed are the uplift of the Tibetan Plateau and the evolution of its cryosphere, the development of fluvial systems, the acidification of the vast arid region of the Asian interior, variations in the monsoon and westerly climate systems on multiple timescales, the development of lakes and wetlands, the watershed system model, soil erosion, past human-environment interactions, biogeography, and physical geographic zonality. After briefly introducing international research developments, we review the history of research in physical geography in China, focusing on the major achievements and major academic debates, and finally we summarize the status of current research and the future prospects. We propose that in the context of the national demand for the construction of an ecological civilization, we should make full use of the research findings of physical geography, and determine the patterns and mechanisms of natural environmental processes in order to continue to promote the continued contribution of physical geography to national development strategies, and to further contribute to the theory of physical geography from a global perspective.Fahu CHEN Bojie FU Jun XIA Duo WU Shaohong WU Yili ZHANG Hang SUN Yu LIU Xiaomin FANG Boqiang QIN Xin LI Tingjun ZHANG Baoyuan LIU Zhibao DONG Shugui HOU Lide TIAN Baiqing XU Guanghui DONG Jingyun ZHENG Wei YANG Xin WANG Zaijun LI Fei Wang Zhenbo HU Jie WANG Jianbao LIU Jianhui CHEN Wei HUANG Juzhi HOU Qiufang CAI Hao LONG Ming JIANG Yaxian HU Xiaoming FENG Xingguo MO Xiaoyan YANG Dongju ZHANG Xiuhong WANG Yunhe YIN Xiaochen LIU 2019Science China Earth Sciences2019,62,11:11
11A tree-ring-based reconstruction of the Yimin River annual runoff in the Hulun Buir region,Inner Mongolia,for the past 135 years显示文摘Based on the relationships between the regional tree-ring chronology(RC) of moisture-sensitive Pinus sylvestris var.mongolica and the monthly mean maximum temperature,annual precipitation and annual runoff,a reconstruction of the runoff of the Yimin River was performed for the period 1868-2002.The model was stable and could explain 52.2% of the variance for the calibration period of 1956-2002.During the past 135 years,21 extremely dry years and 19 extremely wet years occurred.These years represented 15.6% and 14.1% of the total study period,respectively.Six severe drought events lasting two years or more occurred in 1950-1951,1986-1987,1905-1909,1926-1928,1968-1969 and 1919-1920.Four wetter events occurred during 1954-1959,1932-1934,1939-1940 and 1990-1991.Comparisons with other tree-ring-based streamflow reconstructions or chronologies for surrounding areas supplied a high degree of confidence in our reconstruction.Power spectrum and wavelet analyses suggested that the reconstructed annual runoff variation in the Hulun Buir region and surrounding area could be associated with large-scale atmospheric-oceanic variability,such as the Pacific Decadal Oscillation(PDO) and El Ni o-Southern Oscillation(ENSO),and sunspot activity.BAO Guang LIU Yu LIU Na 2012Chinese Science Bulletin2012,57,36:9
12Tree-ring-based annual precipitation reconstruction in Kalaqin, Inner Mongolia for the last 238 years显示文摘A tree-ring-width chronology of Pinus tabulaeformis from Kalaqin, Inner Mongolia was developed using modern dendroc hronological techniques. Based on the results of correlation function analysis, the total precipitation from the previous August to current July was reconstructed for 1771-2008 AD with an explained variance of 49.3%. The reconstruction correlated well with the dryness/wetness series derived from historical documents, as well as the precipitation reconstruction of the Chifeng-Weichang region. There were eight intervals with greater precipitation than the average (associated with the strong East Asian summer monsoon) and seven intervals lower than the average (weak monsoon). A power spectrum analysis showed that there were 120 a, 80 a, 8 a and 2 a periodicities.LIU Yu WANG CaiYong HAO WenJun SONG HuiMing CAI QiuFang TIAN Hua SUN Bo Hans W. LINDERHOLM 2011Chinese Science Bulletin2011,56,28:9
13胡杨(Populus euphratica)树轮记录的20世纪40年代前后黑河下游分水过程及其生态影响显示文摘黑河下游额济纳绿洲在20世纪40年代前后的东、西河分水是历史文献中记录的过去百年黑河流域人为分水的主要事件之一。在额济纳绿洲采集了覆盖绿洲范围的28个胡杨(Populus euphratica)样点,利用树轮学的方法,研究此次分水对河岸胡杨林径向生长的影响。结果表明:相较于1954—1989年的平均状况,1945—1950年东河附近径向生长量平均减少46%,西河附近平均增加16%。1948年为1900—1989年间绿洲内总体胡杨径向生长量最低的年份。所以,在额济纳绿洲内水量分配上,过于集中并不利于绿洲总体胡杨生长。由于受到人类活动的强烈影响及河岸林水分限制因子空间异质性的影响,绿洲内胡杨径向生长存在较大的空间异质性。彭小梅 肖生春 程国栋 肖洪浪 田全彦 2016中国沙漠2016,36,1:8
14不同生境和去趋势方法下的祁连圆柏径向生长对气候的响应显示文摘利用青海不同生境祁连圆柏树木年轮样本,采用3种不同去趋势方法建立树轮年表,结合青海30个气象站的气象资料,分析不同生境和去趋势方法下祁连圆柏径向生长对气候的响应差异。结果表明,祁连山区,生长季前期的平均气温是祁连圆柏树木径向生长的主要限制性因子,NEP树轮标准化宽度年表与生长季前期冬季平均气温相关最好;在柴达木盆地,生长季降水量是该地区树木径向生长的限制性因子,SPL树轮年表对生长季降水量相关较好;在青南高原,祁连圆柏径向生长对春季温度响应最为敏感,而SPL年表与春季温度呈现明显的负相关关系,相关系数达-0.606;而在青海东部地区,祁连圆柏树木径向生长对气候的响应总体不显著。位于青海西部和北部的柴达木盆地和祁连山区祁连圆柏径向生长受西风气候的影响显著,尤其是柴达木盆地,其气候受西风主导;而青南高原受西南季风影响更为显著,该地区祁连圆柏径向生长同时受西南季风气候和海拔高度两方面影响;在青海东部,祁连圆柏径向生长受东亚季风影响更为显著。张瑞波 袁玉江 魏文寿 邵雪梅 喻树龙 陈峰 张同文 尚华明 范子昂 2013生态学报2013,33,24:7
15Analysis of reconstructed annual precipitation from tree-rings for the past 500 years in the middle Qilian Mountain显示文摘The ring-width chronology of a Juniperus przewalskii tree from the middle of the Qilian Mountain was constructed to estimate the annual precipitation (from previous August to current July) since AD 1480.The reconstruction showed four major alternations of drying and wetting over the past 521 years.The rainy 16th century was followed by persistent drought in the 17th century.Moreover,relatively wet conditions persisted from the 18th to the beginning of 20th century until the recurrence of a drought during the 1920s and 1930s.Based on the Empirical Mode Decomposition method,eight Intrinsic Mode Functions (IMFs) were extracted,each representing unique fluctuations of the reconstructed precipitation in the time-frequency domain.The high amplitudes of IMFs on different timescales were often consistent with the high amount of precipitation,and vice versa.The IMF of the lowest frequency indicated that the precipitation has undergone a slow increasing trend over the past 521 years.The 2-3 year and 5-8 year time-scales reflected the characteristics of inter-annual variability in precipitation relevant to regional atmospheric circulation and the El Ni?o-Southern Oscillation (ENSO),respectively.The 10-13 year scale of IMF may be associated with changing solar activity.Specifically,an amalgamation of previous and present data showed that droughts were likely to be a historically persistent feature of the Earth's climate,whereas the probability of intensified rainfall events seemed to increase during the course of the 19th and 20th centuries.These changing characteristics in precipitation indicate an unprecedented alteration of the hydrological cycle,with unknown future amplitude.Our reconstruction complements existing information on past precipitation changes in the Qilian Mountain,and provides additional low-frequency information not previously available.TIAN QinHua ZHOU XiuJi GOU XiaoHu ZHAO Ping FAN ZeXin Samuli HELAMA 2012Science China Earth Sciences2012,55,5:7
16基于树轮水文研究的提孜那甫河径流量长期变化显示文摘西昆仑山北坡山区分布的雪岭云杉是开展树轮水文研究的良好载体,为重建历史水文变化提供了重要的代用资料。分析了西昆仑山北坡雪岭云杉树轮宽度年表对提孜那甫河径流量的响应特征,发现树轮宽度年表与提孜那甫河年径流量(上年8月至当年7月)的显著正相关关系,建立了二者之间的一元线性回归方程,重建了提孜那甫河1665~2013年径流量序列。重建径流量序列中存在7个枯水期和8个丰水期。重建径流量序列平均值为27.87 m3/s,与实测期平均值接近,但重建序列中的极端旱涝的强度和发生频率均更高。基于树木年轮宽度重建更长时间的径流量序列,对于流域水资源科学管理和分配以及下游水库和防洪工程等项目建设的风险评估等具有重要意义。尚华明 程磊 朱克标 王波 温齐古丽.阿吉 范煜婷 张瑞波 范子昂 2018水文2018,38,3:6
17新疆树木年轮水文研究对比分析显示文摘分析新疆地区现已取得的树轮水文学研究成果,选取基于树轮宽度重建的阿尔泰山、天山、昆仑山和塔里木河流域等区域共14条河流径流量序列,对各序列的水文历史变化特征进行对比和讨论,并对进一步开展新疆地区树轮水文学研究提出了建议和展望。研究结果表明:(1)水分是各流域树木径向生长的主要限制因子,且树木径向生长与河流径流量之间普遍存在正相关关系。(2)对新疆5个区域的河流径流量重建序列进行相关分析,发现阿尔泰山区域重建序列间的相关性较高,天山北坡次之,天山南坡最低。阿尔泰山与天山北坡径流量重建序列间亦存在较好的相关性。(3)14条河流径流量重建序列经31 a滑动平均处理后,结果显示同一区域内河流径流量序列丰枯变化的一致性相对较好。(4)5个区域内部径流量重建序列存在相同的极值年份,且重建序列的部分极值年份与历史记录的气候水文灾害相吻合。(5)新疆地区径流量重建序列的周期变化在高频上较为一致,均存在2~7 a的短周期,其径流量变化可能受到海陆大尺度气候振荡的影响。刘蕊 姜盛夏 张同文 陈峰 尚华明 喻树龙 张瑞波 王勇辉 2020沙漠与绿洲气象2020,14,3:6
18青藏高原腹地班德湖记录的全新世夏季风变化与流域环境响应显示文摘青藏高原作为地球“第三极”,对全球气候变化响应敏感。在季风与西风协同作用下,青藏高原在过去数千年中的年代际、百年时间尺度上存在南北相反的气候变化格局;但受限于青藏高原腹地缺少年代可靠的全新世高分辨率气候记录,千年时间尺度高原南北气候变化模态异同仍不明晰,更无从得知高原腹地湖泊及其流域的生态环境对气候变化的响应过程。本研究聚焦高原腹地沱沱河上游的开放湖泊班德湖(34.239°N,92.099°E;4583 m a.s.l),基于长115 cm的BDH19A沉积物岩芯的植物残体AMSC年代建立了可靠的年代框架,通过粒度、元素、矿物、自生碳酸盐及其碳、氧同位素、有机质含量和正构烷烃等多指标,重建了过去10 ka以来青藏高原中部的气候变化与生态环境响应过程。结果显示,青藏高原腹地在全新世以来表现出北半球夏季太阳辐射控制下夏季风降水逐渐减少的季风模式,导致流域和湖泊生产力持续降低,区域风沙活动整体增强。在千年时间尺度上,10~8.7 ka高原中部夏季风降水量最大,加之可能由于植物覆盖度较高,流域径流侵蚀减弱,风沙活动减少;7.7~5.2 ka和4~2 ka夏季风降水维持高值,入湖径流增加,促进流域和湖泊生物生产力提高,风沙活动受到抑制;相反,8.7~7.7 ka、 5.2~4 ka和2 ka以来高原中部风沙活动的加剧是对亚洲夏季风快速衰退的响应,当前班德湖流域风沙环境是过去2 ka干旱风沙环境的延续与加剧。李友谟 吴铎 袁子杰 陈林 陈雪梅 周爱锋 2022第四纪研究2022,42,5:6
19结合微树芯方法的树木生长生理生态学研究进展显示文摘近年来迅速发展的微树芯技术(micro-sampling approach)通过每周采集树干木质部的微样芯,并制作生物切片来实时监测整个生长季的树干形成层细胞分裂活动以及木质部的形成过程。与传统的树木年轮学方法相比,微树芯技术能从一个更微观、更准确的角度探索树木内在生理过程及树木生长对外界环境的响应。该文概述了微树芯技术的发展历程和应用前景,并结合国内外研究来阐述利用树木微树芯技术研究树木初级生长和次级生长及其关系,以及在全球变化(升温、干旱以及碳、氮增肥效应)背景下树木年内径向生长的响应机制,为进一步预测森林生产力和固碳潜力以及实现可持续林业经营管理的政府决策提供科学依据。郭霞丽 余碧云 梁寒雪 黄建国 2017植物生态学报2017,41,7:6
20福建长汀福建柏径向生长对气候变化的响应显示文摘基于树木年代学的研究理论与方法,建立了福建长汀地区福建柏(Fokienia hodginsii)的树轮宽度的标准化年表,并探索了其径向生长与1956—2013年期间前年3月到当年11月的月均温、月降水量气候因子的响应特征。结果表明:福建柏的径向生长主要与当年秋季(9—10月)温度气温与前年春夏季(4—8月)降水显著正相关(P<0.05);25 a滑动相关分析发现两者相关显著的时段比较一致,均集中在1970s—1990s时段,说明该时段气候因子对树木生长的限制作用更为明显。响应面回归分析表明,仅气温温度或降水的改善,并不能显著促进福建柏的径向生长,只有当两者同时改善后,树木的生长才会加速。甘展峰 周非飞 董志鹏 李颖俊 张雨 方克艳 2017亚热带资源与环境学报2017,12,1:6
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