植物叶片性状沿海拔梯度变化研究进展

由于在海拔梯度上各种环境因子表现出连续的梯度性变化,以海拔梯度为平台研究植物叶片性状的适应特征有助于揭示植物对气候变化的响应,进而可以为研究全球变化与陆地生态系统的关系提供研究基础。本文重点分析了植物的叶寿命、比叶面积、叶氮含量、叶绿素含量等叶片结构性状和气孔导度、叶片羧化效率、水分利用效率和叶片δ^18C等叶片功能性状随海拔梯度的变化规律和特点,探讨了植物叶片性状的研究不足及未来发展方向,以便为国内相关研究的开展提供参考。     

额济纳绿洲河岸胡杨(Populus euphratica)叶水势变化特征

利用WP4露点水势仪对额济纳绿洲胡杨(Populus euphratica)叶水势进行测定,研究了胡杨叶水势的日和月变化规律及其影响因子。结果表明:(1)胡杨叶水势日进程呈"V"形,最小值大都出现在13:00,日均值为-2.53±0.30MPa;月变化呈先上升后下降趋势,月均值为-2.43±0.30MPa。(2)树龄越小对应的叶水势越高;叶片着生部位越高,对应的水势越低;卵圆形叶水势整体稍高于披针形叶水势。(3)叶水势与气温、饱和水汽压差和蒸腾速率呈极显著线性负相关,相关系数依次为-0.87、-0.69和-0.88;与相对湿度和光合速率呈极显著二次多项式相关,相关系数分别为0.85和0.92。胡杨叶水势各方面的综合研究对于明晰胡杨的水分亏缺和抗旱机理有一定的理论指导意义。     

中国亚热带丘陵山区植被沿海拔梯度分布格局(英文)

Knowledge of vegetation distribution patterns is very important.Their relationships with topography and climate were explored through a geographically weighted regression(GWR) framework in a subtropical mountainous and hilly region,Minjiang River Basin of Fujian in China.The HJ-1 satellite image acquired on December 9,2010 was utilized and NDVI index was calculated representing the range of vegetation greenness.Proper analysis units were achieved through segregation based on small sub-basins and altitudinal bands.Results indicated that the GWR model was more powerful than ordinary linear least square(OLS) regression in interpreting vegetation-environmental relationship,indicated by higher adjusted R 2 and lower Akaike information criterion values.On one side,the OLS analysis revealed dominant positive influence from parameters of elevation and slope on vegetation distribution.On the other side,GWR analysis indicated that spatially,the parameters of topography had a very complex relationship with the vegetation distribution,as results of the various combinations of environmental factors,vegetation composition and also anthropogenic impact.The influences of elevation and slope generally decreased,from strongly positive to nearly zero,with increasing altitude and slope.Specially,most rapid changes of coefficients between NDVI and elevation or slope were observed in relatively flat and low-lying areas.This paper confirmed that the non-stationary analysis through the framework of GWR could lead to a better understanding of vegetation distribution in subtropical mountainous and hilly region.It was hoped that the proposed scale selection method combined with GWR framework would provide some guidelines on dealing with both spatial(horizontal) and altitudinal(vertical) non-stationarity in the dataset,and it could easily be applied in characterizing vegetation distribution patterns in other mountainous and hilly river basins and related research.     

沿三条水汽输送路径的降水中(&)18o变化特征

分析和比较了沿三条水汽输送路径降水中稳定同位素的变化.沿南方水汽路径,低纬度地区取样站降水中平均δ18O的季节差异较小.自曼谷起,降水中δ18O的季节差异明显增加.沿北方水汽路径,郑州以西取样站暖半年与冷半年平均δ18O的季节差异均大于零.随着经度的增加,降水中平均δ18O的季节差减小.沿高原水汽路径,印度次大陆南部降水中的δ18O相对较高,随着纬度的增加,降水中δ18O逐渐减小.在翻越喜马拉雅山后,由于强烈的洗涤作用,降水中δ18O急剧下降.     

喀什地区降水(雨雪)的日变化特征

利用2010—2017年1～12月新疆喀什地区10个气象站逐小时降水资料,分析统计喀什地区近8 a降雨雪(以下统称降水)日变化特征。结果表明:(1)喀什地区全年降水量和降水频次日变化存在明显的波动,总体上呈现"正弦波"一峰一谷特征,降水量峰值出现在03:00(北京时,下同),谷值出现在18:00;降水频次峰值出现在04:00,谷值出现在18:00;两者峰谷值出现时间接近。(2) 2010—2017年喀什地区全年降水量和降水频次呈明显的增加趋势;而降水强度年际变化趋于平缓,无明显变化。(3)降水强度日变化趋势与降水量、降水频次并不存在一致性。(4)喀什地区全年降水主要以短时段降水为主,其中,持续1 h降水次数为最大值,但降水量和贡献率最大值却同出现在2 h和6 h持续降水中。全年降水主要以后半夜和上午开始的降水过程为主导,且仍主要为短时段降水。     

武夷山沿海拔梯度土壤活性有机碳库的变化(英文)

土壤活性有机碳(LOC)是一组活跃的化学物质,由于其较短的周转时间和对环境变化的敏感性在全球碳循环中发挥着重要的作用。但是,对活性有机碳在亚热带森林沿海拔梯度的空间变异还缺乏了解。在本研究中,我们测定了福建武夷山自然保护区不同海拔高度具有代表性的中亚热带常绿阔叶林(500 m)、针叶林(1150 m)、亚高山矮林(1750 m)以及高山草甸(2150 m)土壤不同土层(0-10,10-25和25-40 cm)中微生物可利用碳(MAC)、微生物量碳(MBC)、易氧化碳(ROC)、水溶性碳(WSOC)和轻组碳(LFC),并观测了相应的植物凋落物质量(LM),土壤温度和湿度。结果表明:沿海拔梯度的植被变化和土层深度变化对土壤活性有机碳有显著的影响。微生物可利用碳、微生物量碳、易氧化碳和水溶性碳在不同土层均沿海拔高度的增加而显著增加;而低海拔的常绿阔叶林和针叶林中轻组碳的含量高于亚高山矮林和高山草甸的轻组碳的含量。各土壤活性有机碳库均随土层的加深而减小。除轻组碳外,各碳库间存在着极显著的正相关(p0.001)。轻组碳分别在低海拔(常绿阔叶林和针叶林)和高海拔(亚高山矮林和高山草甸)与各碳库显著相关。     

柴达木盆地东缘地区风资源变化特征(英文)

基于风资源梯度自动观测系统,对柴达木盆地东缘地区风资源时间变化及空间分布特征进行了分析,结果表明:(1)研究区域具有较为丰富的风资源,3-25 m s-1之间风速累计时数平均超过6600h,也即275d,超过全年总时数的75%。从各梯度来看,随高度增加累积时数总体增加,小风时越往低层风速累计时数越大,大风时越往高层风速累计数越大;各分析站点中戈壁(GB)<3 m s-1风速时数相对最高,诺木洪(NMH)相对最低,≥3 m s-1风速时数正好相反;有效风速累计小时数小灶火(XZH)各梯度间差异不大,戈壁(GB)总体相对最小。(2)各梯度优势风速谱域基本处在3-9 m s-1范围,峰值风速出现在4-6 m s-1之间;除10 m梯度外,其余各梯度风速频率分布差异不大。相比较其它各层,10 m高度层小风出现频次较高,其余层6-12 m s-1的风速出现频次较高。(3)从不同方位风速及风功率密度情况来看,除戈壁(GB)外,总体优势风为西北风;除诺木洪外,总体风速差异不大。(4)随高度增加风速和风功率密度逐渐增大;但各站点之间差异较大。从逐月情况来看,小灶火(XZH)5-8月份平均风功率密度较大、诺木洪(NMH)和戈壁(GB)分别在4月和8月呈现出两个峰值、快尔玛(KEM)则在冬春季节风资源较丰富,而在夏季较贫乏;从逐小时情况来看,小灶火(XZH)和诺木洪(NMH)呈现出伴随地面温度升高风功率密度逐渐降低的趋势,戈壁(GB)和快尔玛(KEM)则正好相反。(5)各层风平均湍流强度为0.199,平均切变指数为0.075,自10-70m梯度湍流强度和切变指数总体自低层到高层逐渐降低。时间变化情况为,湍流强度与当地气温变化趋势基本一致,即高温对应高湍流,低温对应低湍流;切变指数变化趋势基本与湍流强度相反;各梯度间湍流强度自低层向高层递降,切变指数在10-30m层间最明显。各站点各层次湍流强度基本在0.1-0.25之间,属中等强度;切变指数各站点各层之间差异较大,总体小灶火(XZH)最小,诺木洪(NMH)最大,而且小灶火(XZH)底层为正切变,高层为负切变。期望通过本研究为该地区风电场布设及近地面层风能资源利用提供技术依据。     

新疆气候时空变化特征及其趋势(英文)

Temperature and precipitation time series datasets from 1961 to 2005 at 65 meteorological stations were used to reveal the spatial and temporal trends of climate change in Xinjiang, China. Annual and seasonal mean air temperature and total precipitation were analyzed using Mann-Kendall (MK) test, inverse distance weighted (IDW) interpolation, and R/S methods. The results indicate that: (1) both temperature and precipitation increased in the past 45 years, but the increase in temperature is more obvious than that of precipitation; (2) for temperature increase, the higher the latitude and the higher the elevation the faster the increase, though the latitude has greater influence on the increase. Northern Xinjiang shows a faster warming than southern Xinjiang, especially in summer; (3) increase of precipitation occurs mainly in winter in northern Xinjiang and in summer in southern Xinjiang. Ili, which has the most precipitation in Xinjiang, shows a weak increase of precipitation; (4) although both temperature and precipitation increased in general, the increase is different inside Xinjiang; (5) Hurst index (H) analysis indicates that climate change will continue the current trends.     

黄河下游河道改道的地理变化特征(英文)

The changing pattern of the Lower Yellow River (LYR) obtained from the traditional studies, which mainly did literal analysis based on historical documents related to the LYR are too macroscopic and absent of intuitiveness. This paper integrates all the records in historical documents related to course shift, flood and overflow of the last 3000 years and stores them in a GIS database. Then, all the data will be visualized in the form of map, which is helpful to show and understand the rules those events conform more intuitively and accurately. Taking these data as foundation, this study summarizes characteristics of the LYR’s courses and influence scope, and classifies them both into three types; divides the flow directions of the LYR’s courses into two periods, and proposes its changing pattern; concludes the characteristic of diversion points of courses shift events; calculates the velocity of courses shifts, gradient and sinuosity, and analyzes their changing patterns. Finally, this study classifies factors that may influence the occurrence of a course shift into two types: the internal factors, such as sediment rate, gradient and sinuosity of the river, and the external factors, such as precipitation and human activities.     

水盐梯度下湿地柽柳(Tamarix ramosissima)光合响应特征和水分利用效率

光合响应特征与水分利用效率研究对深入理解柽柳(Tamarix ramosissima)对水盐胁迫的适应性机制十分必要,可为荒漠绿洲湿地盐渍化的改善和治理提供科学指导。以荒漠绿洲湿地柽柳为研究对象,利用Li-6400光合仪测定水盐梯度下柽柳的光合参数及其对光强的响应,探讨水盐梯度对荒漠绿洲湿地植物光合作用和水分利用效率的影响机制。结果表明:荒漠绿洲湿地柽柳的净光合速率(P_n)呈不对称双峰型日变化趋势,河岸灌木、盐沼和绿洲草地湿地的次峰较主峰分别下降19%、8.5%和11.2%;蒸腾速率(T_r)表现为单峰型。在同一水盐环境下,柽柳的Pn和水分利用效率(WUE)随光合有效辐射(PAR)的增强先快速升高后渐趋平缓。Tr对PAR的增强表现均不敏感。盐沼湿地柽柳的最大净光合速率、光饱和点与表观量子效率均最大,光补偿点最小。柽柳光饱和点512.67~1 790μmol·m~(-2)·s~(-1),光补偿点16.28~19.23μmol·m~(-2)·s~(-1)。适度的水盐含量会促进光合作用,水盐含量过高或过低均会抑制光合速率。盐分含量越低,荒漠绿洲湿地柽柳适应光强的范围越广。适度的水分含量下降可促进水分利用效率的提高。     

1960-2012年内蒙古寒潮时空变化特征(英文)

In this study, we analyzed the spatiotemporal variation of cold surges in Inner Mongolia between 1960 and 2012 and their possible driving factors using daily minimum temperature data from 121 meteorological stations in Inner Mongolia and the surrounding areas. These data were analyzed utilizing a piecewise regression model, a Sen+MannKendall model, and a correlation analysis. Results demonstrated that(1) the frequency of single-station cold surges decreased in Inner Mongolia during the study period, with a linear tendency of –0.5 times/10a(–2.4 to 1.2 times/10a). Prior to 1991, a significant decreasing trend of –1.1 times/10a(–3.3 to 2.5 times/10a) was detected, while an increasing trend of 0.45 times/10a(–4.4 to 4.2 times/10a) was found after 1991. On a seasonal scale, the trend in spring cold surges was consistent with annual values, and the most obvious change in cold surges occurred during spring. Monthly cold surge frequency displayed a bimodal structure, and November witnessed the highest incidence of cold surge.(2) Spatially, the high incidence of cold surge is mainly observed in the northern and central parts of Inner Mongolia, with a higher occurrence observed in the northern than in the central part. Inter-decadal characteristic also revealed that high frequency and low frequency regions presented decreasing and increasing trends, respectively, between 1960 and 1990. High frequency regions expanded after the 1990 s, and regions exhibiting high cold surge frequency were mainly distributed in Tulihe, Xiao’ergou, and Xi Ujimqin Banner.(3) On an annual scale, the cold surge was dominated by AO, NAO, CA, APVII, and CQ. However, seasonal differences in the driving forces of cold surges were detected. Winter cold surges were significantly correlated with AO, NAO, SHI, CA, TPI, APVII, CW, and IZ, indicating they were caused by multiple factors. Autumn cold surges were mainly affected by CA and IM, while spring cold surges were significantly correlated with CA and APVII.     

青藏高原蒸发皿蒸发量时空变化特征及其成因的定量分析(英文)

Despite the observed increase in global temperature, observed pan evaporation in many regions has been decreasing over the past 50 years, which is known as the "pan evaporation paradox". The "pan evaporation paradox" also exists in the Tibetan Plateau, where pan evaporation has decreased by 3.06 mm a-2 (millimeter per annum). It is necessary to explain the mechanisms behind the observed decline in pan evaporation because the Tibetan Plateau strongly influences climatic and environmental changes in China, Asia and even in the Northern Hemisphere. In this paper, a derivation based approach has been used to quantitatively assess the contribution rate of climate factors to the observed pan evaporation trend across the Tibetan Plateau. The results showed that, provided the other factors remain constant, the increasing temperature should have led to a 2.73 mm a-2 increase in pan evaporation annually, while change in wind speed, vapor pressure and solar radiation should have led to a decrease in pan evaporation by 2.81 mm a-2, 1.96 mm a-2 and 1.11 mm a-2 respectively from 1970 to 2005. The combined effects of the four climate variables have resulted in a 3.15 mm a-2 decrease in pan evaporation, which is close to the observed pan evaporation trend with a relative error of 2.94%. A decrease in wind speed was the dominant factor for the decreasing pan evaporation, followed by an increasing vapor pressure and decreasing solar radiation, all of which offset the effect of increasing temperature across the Tibetan Plateau.     

内蒙古荒漠草原沙生针茅(Stipa glareosa)、碱韭(Allium polyrhizum)和骆驼蓬(Peganum harmala)叶形态性状对土壤水氮耦合的响应

研究降水和氮沉降对荒漠草原植物叶形态性状的影响,对于预测未来全球变化下荒漠草原植物的生态适应具有重要意义.对增减雨(±50％)和氮添加(10 g·m-2.a-1)及其交互作用对乌拉特荒漠草原区优势植物叶形态性状的影响研究结果表明:(1)沙生针茅(Stipa glareosa)、碱韭(Allium polyrhizum)...     

中国东部城市旅游效率的空间特征——以沿海城市群为例(英文)

The traditional data envelopment analysis(DEA), bootstrap-DEA and Malmquist models are employed to measure different tourism efficiencies and their spatial characteristics of 61 cities in six coastal urban agglomerations in eastern China. The following conclusions are drawn.(1) The comprehensive efficiency(CE) of urban tourism using the bootstrap-DEA model is lower than the CE level using the DEA-CRS model, which confirms the significant tendency of the DEA-CRS model to overestimate results.(2) The geometric CE averages of urban tourism in the Yangtze River Delta(YRD) and the Pearl River Delta(PRD) have changed from ineffective to effective since 2000, the averages in the Beijing-TianjinHebei(BTH) and the Shandong Peninsula(SDP) have changed from ineffective to moderately effective since 2000, and those in the Central and Southern Liaoning(CSL) and the West Bank of Taiwan Strait(WBTS) have been ineffective since 2000.(3) The CE values of urban tourism in the PRD, the YRD, the BTH and the SDP have been slightly affected by the pure technical efficiency(PTE), whereas the CE values in the CSL and the WBTS have been slightly affected by the scale efficiency(SE) since 2000.(4) Spatially, the range of geometric averages of the total factor productivity(TFP) for the PRD, the YRD, the BTH, the SDP, the WBTS and the CSL has decreased sequentially, while the one for most cities in six urban agglomerations has exhibited a downward trend since 2000.(5) Collectively, the natural conditions, the economic policies and the tourism capital drive the SE change of urban tourism of the CSL and the WBTS. The tourism enterprises for increasing returns to scale and imitating innovative technology have an effect on the CE change of urban tourism in the BTH and the SDP. The tourism market competition drives the PTE change of urban tourism in the PRD and the YRD. Although the PTE and the SE of urban tourism in six coastal urban agglomerations suffer from uncertain events, the CE maintained overall sound momentum since 2000.     

海(咸)水入侵与浅层地下水水化学特征及变化研究

利用山东莱州湾沿岸海水入侵监测剖面的水化学监测数据,从水化学指标与Ｃｌ＾－含量的关系入手,采用不同侵染程度组段钭所选定的水化学指标对Ｃｌ＾－含量作回归分析的方法,对海水入侵过程中浅层一上水水化学特征变化作了研究。研究表明,多数水化学指标及几项灌溉水质指标与侵染程度有较明显的宏观相关性,但不是简单的线性关系,两个剖面分析数据的对比揭示出莱州湾东部与南部沿岸海水入侵的区域差异性。     

中国典型土地覆盖类型地表反照率的年内变化特征(英文)

Surface albedo is a primary causative variable associated with the process of surface energy exchange. Numerous studies have examined diurnal variation of surface albedo at a regional scale; however, few studies have analyzed the intra-annual variations of surface albedo in concurrence with different land cover types. In this study, we amalgamated surface albedo product data(MCD43) from 2001 to 2008, land-use data(in 2000 and 2008) and land cover data(in 2000); quantitative analyses of surface albedo variation pertaining to diverse land cover types and the effect of the presence/absence of ground snow were undertaken. Results indicate that intra-annual surface albedo values exhibit flat Gaussian or triangular distributions depending upon land cover types. During snow-free periods, satellite observed surface albedo associated with the non-growing season was lower than that associated with the growing season. Satellite observed surface albedo during the presence of ground snow period was 2–4 times higher than that observed during snow-free periods. Surface albedo reference values in typical land cover types have been calculated; notably, grassland, cropland and built-up land were associated with higher surface albedo reference values than barren while ground snow was present. Irrespective of land cover types, the lowest surface albedo reference values were associated with forested areas. Proposed reference values may prove extremely useful in diverse research areas, including ecological modeling, land surface process modeling and radiation energy balance applications.     

1944-2005年黑河流域径流量变化特征及趋势(英文)

The Heihe River drainage basin is one of the endangered ecological regions of China. The shortage of water resources is the bottleneck,which constrains the sustainable development of the region. Many scholars in China have done researches concerning this problem. Based on previous researches,this paper analyzed characteristics,tendencies,and causes of annual runoff variations in the Yingluo Gorge (1944-2005) and the Zhengyi Gorge (1954-2005),which are the boundaries of the upper reaches,the middle reaches,and the lower reaches of the Heihe River drainage basin,by wavelet analysis,wavelet neural network model,and GIS spatial analysis. The results show that: (1) annual runoff variations of the Yingluo Gorge have principal periods of 7 years and 25 years,and its increasing rate is 1.04 m3/s·10y; (2) annual runoff variations of the Zhengyi Gorge have principal periods of 6 years and 27 years,and its decreasing rate is 2.25 m3/s·10y; (3) prediction results show that: during 2006-2015,annual runoff variations of the Yingluo and Zhengyi gorges have ascending tendencies,and the increasing rates are respectively 2.04 m3/s·10y and 1.61 m3/s·10y; (4) the increase of annual runoff in the Yingluo Gorge has causal relationship with increased temperature and precipitation in the upper reaches,and the decrease of annual runoff in the Zhengyi Gorge in the past decades was mainly caused by the increased human consumption of water resources in the middle researches. The study results will provide scientific basis for making rational use and allocation schemes of water resources in the Heihe River drainage basin.     

人工模拟降雨变化对白刺(Nitraria tangutorum)生理生态特征的影响

为研究气候变化背景下降水格局改变对荒漠植物生长的影响,以甘肃民勤典型荒漠植物白刺(Nitraria tangutorum)作为对象,通过4年连续人工模拟增雨试验(+0%、+25%、+50%、+75%和+100%多年平均降水量),于2011年7月对不同增雨处理的白刺土壤水分、叶片性状和枝条形态特征进行测定,研究不同増雨处理影响白刺生理生态特征变化的累积效应。结果表明:75%和100%增雨处理能够显著改善白刺灌丛10cm土层的含水量。白刺叶水势、净光合速率、蒸腾速率、气孔导度、比叶面积、单位重量叶氮含量,以及枝条长度和基部直径的增长量均随降水量的增加而增加。100%增雨处理的叶水势和叶片功能性状指标在增雨后第1天显著大于0%处理(P0.05);比叶面积和叶氮含量在各増雨处理下均未达到显著差异(P0.05);75%、100%增雨处理的枝条长度和基部直径的增长量比0%处理的分别增加64.57%、66.63%和48.71%、67.54%,且达到显著差异水平(P0.05),这说明在降水增加的情景下,白刺通过采取内在生理和外在形态方面的适应策略来促进其生长发育。     

2000–2011年三江源区植被覆盖时空变化特征(英文)

The Three-River Headwaters Region(TRHR), which is the source area of the Yangtze River, Yellow River, and Lancang River, is of key importance to the ecological security of China. Because of climate changes and human activities, ecological degradation occurred in this region. Therefore, "The nature reserve of Three-River Source Regions" was established, and "The project of ecological protection and construction for the Three-River Headwaters Nature Reserve" was implemented by the Chinese government. This study, based on MODIS-NDVI and climate data, aims to analyze the spatiotemporal changes in vegetation coverage and its driving factors in the TRHR between 2000 and 2011, from three dimensions. Linear regression, Hurst index analysis, and partial correlation analysis were employed. The results showed the following:(1) In the past 12 years(2000–2011), the NDVI of the study area increased, with a linear tendency being 1.2%/10a, of which the Yangtze and Yellow River source regions presented an increasing trend, while the Lancang River source region showed a decreasing trend.(2) Vegetation coverage presented an obvious spatial difference in the TRHR, and the NDVI frequency was featured by a bimodal structure.(3) The area with improved vegetation coverage was larger than the degraded area, being 64.06% and 35.94%, respectively during the study period, and presented an increasing trend in the north and a decreasing trend in the south.(4) The reverse characteristics of vegetation coverage change are significant. In the future, degradation trends will be mainly found in the Yangtze River Basin and to the north of the Yellow River, while areas with improving trends are mainly distributed in the Lancang River Basin.(5) The response of vegetation coverage to precipitation and potential evapotranspiration has a time lag, while there is no such lag in the case of temperature.(6) The increased vegetation coverage is mainly attributed to the warm-wet climate change and the implementation of the ecological protection project.     

西北太平洋区域海面变化——过程、特征与预测(英文)

Based on 22 sparse-distributed tide gauge records in the Northwest Pacific Ocean marginal sea, the process, characteristic and prediction of regional sea level change are discussed by the integration of the following methods. Firstly, the regularized EM algorithm (RegEM) and the Multi-taper Spectral Method (MTM) are adopted to interpret their multiscale fluctuation processes and their spatial-temporal variations. Secondly, the orderly cluster method is introduced to classify these tidal stations, and with the consideration of the space adjacent relation, we obtain five sub-regions (the coasts of Bohai Sea-northern Yellow Sea, Yellow Sea-East China Sea along Chinese coast, the East China Sea along Japanese coast, the southern East China Sea and the northwestern South China Sea). Furthermore, the Mean Generation Function (MGF) is explored to predict the medium- and long-term trends of each tide station. Finally, the Principal Component Analysis (PCA) is employed to obtain re-gional-scale sea level change trends, sea level rise rates of the above five sub-regions from 2001 to 2030 are 1.23-1.27 mm/a, 3.30-3.34 mm/a, 2.72-2.76 mm/a, 1.43-1.47 mm/a and 1.13-1.15 mm/a respectively, and the whole region sea level rise rate is between 2.01 mm/a and 2.11 mm/a. The aim of our work is to conduct an integrated research on regional sea level change.