浅谈气象档案管理工作发展对策     

唐炳莉  陈德诚  尚惠玲  苏晓红 《气象研究与应用》2006,27(4):69-71

通过总结广西气象档案工作的现状及存在的问题,提出气象档案管理工作的发展对策。  相似文献   

建设地震部门档案体系的设想     

李小邨  李燕 《高原地震》2008,20(1):68-69

0 引言 我国的地震专业队伍是从1966年的河北邢台地震以后,在敬爱的周恩来总理的亲自关怀下建立起来的。40多年来,地震专业队伍从小到大,从群测群防到规范化、现代化,走过了一条漫长的道路。只是迄今地震预报难关尚未攻克,我们还不能从大量的观测资料中区分出哪些是地震前兆,哪些是干扰因素,只好留待以后科学进步了,再来分析利用这些观测数据。这就需要我们进一步做好地震档案工作,好好保存这些宝贵的地震档案。  相似文献   

Response of arid northeast Mexico to global climate changes during the late Pleistocene to the middle Holocene     

Priyadarsi D. Roy  Guillermo Vera-Vera  Jason H. Curtis  José L. Sánchez-Zavala  Jesús David Quiroz-Jiménez  Gowrappan Muthu Sankar 《地球表面变化过程与地形》2019,44(11):2211-2222

Anthropogenic global warming might cause expansion of the drylands and trigger socio-economic challenges in the water-deficit subtropical regions. Changes in hydroclimate during the intervals of variable global temperature over the recent geological past, however, could provide useful information about the possible responses of these arid ecosystems to the near future warmer conditions. We evaluated hydroclimates of two different parts of subtropical North America by generating new records of surface processes and regional vegetation from drought-prone northeast Mexico and subsequently compared them with the paleoclimate of the central-southern United States. Our study suggests that congruent changes occurred in both parts during ~13.5–9.5 cal ka BP, an interval with no warm pool in the northern Gulf of Mexico. The precipitation and erosion responded to temperature-modulated variations in positions of the Inter-Tropical Convergence Zone (ITCZ). Conditions were wetter than today in the subsequent warmer interval (~9.5–8.2 cal ka BP) with generally stable ITCZ and the highest summer insolation. Hydroclimate changes of both parts lacked congruency during ~8.2–6.8 cal ka BP as the northern Gulf of Mexico began hosting a warm pool. Similar to the modern conditions, this warm pool might have modified trajectories of the tropical storms. Erosion and abundance of C₃ plants decreased in northeast Mexico. Higher wetness in the Mississippi River Basin and the southern Great Plains during this interval suggested that the storms made landfall more frequently in the central-southern United States. © 2019 John Wiley & Sons, Ltd.  相似文献   

Semi-automated detection of landslide timing using harmonic modelling of satellite imagery,Buckinghorse River,Canada     

《International Journal of Applied Earth Observation and Geoinformation》2020

We manually detected and mapped 66 landslides from Landsat imagery over a 33-year period from 1985 to 2017 in the Buckinghorse River region, British Columbia, Canada. We semi-automatically determined landslide timing using the cumulative difference (CD) between the normalized difference vegetation index (NDVI) and a fitted harmonic sinusoidal curve (CDNDVI). The semi-automated dating method was capable of determining the timing of 80% of the landslides using CDNDVI and 85% of the landslides after detrending CDNDVI (dCDNDVI). The CDNDVI method generally detects landslides too early and the dCDNDVI method is generally too late. Mean absolute errors (in days) are lower for the dCDNDVI (208 and 188) than the CDNDVI (227 and 267), respectively. This study, however, has many examples of extreme outliers with very large errors (>1000 days). Our method is portable to other remote regions as long as vegetation anomalies can be used as an indicator for landslide activity. We conclude that the timeseries of images available in the Landsat Archive are useful for landslide mapping, but the pixel size limits the size of the landslides that can be mapped.  相似文献   

测绘成果档案快速提供系统的设计及实现     

任玉伟 《东北测绘》2012,(10):31-33

测绘成果档案的内容复杂、种类繁多。同时,测绘成果档案又是国家经济建设的基础保障。如何有效、规范地管理,如何准确、快速地向社会提供成果是测绘成果档案部门亟待解决的问题。本文设计实现的测绘成果档案快速提供系统提供了一些解决方案。  相似文献   

勘察设计企业档案利用服务体系创新工作研究     

靳张铝  王红 《中国勘察设计》2009,(4):57-60

从勘察设计企业对档案利用需求出发,按照现代企业制度要求,研究建立一套突出高效利用的档案服务体系,从电子文件收集开始,到为用户提供网络环境下的快速查询利用的系统解决方案,对企业档案现代化建设进行创新探索。  相似文献   

浅谈缩微技术在图书（档案）馆中的应用     

刘红建  牛晓莉 《吉林地质》2001,20(1):76-78

本文在缩微制品可以抢救保存珍贵书刊资料，增补馆藏、节省经费、解决汉字信息处理以及使用缩微设备应该注意的几个问题方面，阐述了缩微技术在图书（档案）馆中有推广应用价值，是解决当前图书（档案）馆经费短缺、库藏空间紧张行之有效的方法之一。  相似文献   

国内太阳数据VO化初步方案   总被引：1，自引：0，他引：1  

林钢华 《天文研究与技术》2004,1(3):210-215

随着太阳物理研究的深入、观测仪器的发展、观测数据的积累，促使人们去思考这样的问题：利用全世界不同时间、地点、波段的太阳相关数据、历史数据去对很多悬而未解的科学问题寻求答案，同时使研究者容易的去检索这些数据，进行分析，这就是虚拟太阳天文台要解决的问题，也是为什么虚拟太阳天文台项目得到了全世界有关天文台、研究所和大学的积极响应和运作。本文介绍了国内应如何面对虚拟天文台的发展及国内太阳数据VO化初步方案。  相似文献   

PDS行星数据系统研究及其应用   总被引：2，自引：0，他引：2  

杨宏伟  赵文津  吴珍汉 《地质学报》2015,89(12):2419-2432

PDS行星数据系统是存储和发布美国NASA所有行星探测数据的信息平台,是行星科学研究和发展的重要基础。PDS的标准、存储结构和数据处理流程是由NASA协同多个行星研究所和多个大学共同制定,为行星数据的存储和应用提供重要保障。由此,对于这些标准的深入研究是了解和应用这些数据的基础。本文从PDS建立的科学意义,及最原始建立的科学目标和科学任务出发,从底层分析PDS数据文档存储结构,并结合项目组实际使用经验给出最便捷、最实用的数据使用方式及科学软件工具的实际经验。最后,本文以实际数据为例给出了PDS详细的使用流程以及最终处理成果,并在最后提出了PDS的未来发展建议。希望能为我国行星科学家及行星数据库系统平台的建设提供重要参考。同时,PDS行星数据库系统平台作为更广阔的数据系统平台,它也为中国行星科学甚至地球科学建设提供重要参考依据。  相似文献   

Sedimentary evolution and environmental history of Lake Van (Turkey) over the past 600 000 years   总被引：1，自引：0，他引：1  

Mona Stockhecke  Michael Sturm  Irene Brunner  Hans‐Ulrich Schmincke  Mari Sumita  Rolf Kipfer  Deniz Cukur  Ola Kwiecien  Flavio S. Anselmetti 《Sedimentology》2014,61(6):1830-1861

The lithostratigraphic framework of Lake Van, eastern Turkey, has been systematically analysed to document the sedimentary evolution and the environmental history of the lake during the past ca 600 000 years. The lithostratigraphy and chemostratigraphy of a 219 m long drill core from Lake Van serve to separate global climate oscillations from local factors caused by tectonic and volcanic activity. An age model was established based on the climatostratigraphic alignment of chemical and lithological signatures, validated by ⁴⁰Ar/³⁹Ar ages. The drilled sequence consists of ca 76% lacustrine carbonaceous clayey silt, ca 2% fluvial deposits, ca 17% volcaniclastic deposits and 5% gaps. Six lacustrine lithotypes were separated from the fluvial and event deposits, such as volcaniclastics (ca 300 layers) and graded beds (ca 375 layers), and their depositional environments are documented. These lithotypes are: (i) graded beds frequently intercalated with varved clayey silts reflecting rising lake levels during the terminations; (ii) varved clayey silts reflecting strong seasonality and an intralake oxic–anoxic boundary, for example, lake‐level highstands during interglacials/interstadials; (iii) CaCO₃‐rich banded sediments which are representative of a lowering of the oxic–anoxic boundary, for example, lake level decreases during glacial inceptions; (iv) CaCO₃‐poor banded and mottled clayey silts reflecting an oxic–anoxic boundary close to the sediment–water interface, for example, lake‐level lowstands during glacials/stadials; (v) diatomaceous muds were deposited during the early beginning of the lake as a fresh water system; and (vi) fluvial sands and gravels indicating the initial flooding of the lake basin. The recurrence of lithologies (i) to (iv) follows the past five glacial/interglacial cycles. A 20 m thick disturbed unit reflects an interval of major tectonic activity in Lake Van at ca 414 ka bp . Although local environmental processes such as tectonic and volcanic activity influenced sedimentation, the lithostratigraphic pattern and organic matter content clearly reflect past global climate changes, making Lake Van an outstanding terrestrial archive of unprecedented sensitivity for the reconstruction of the regional climate over the last 600 000 years.  相似文献