共查询到20条相似文献，搜索用时 15 毫秒
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Core Undertones with Rotation 总被引：2，自引：0，他引：2
D. J. Crossley 《Geophysical Journal International》1975,42(2):477-488.
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Some experiments with 'orthotides' 总被引：1，自引：0，他引：1
Summary. Properties of the Groves & Reynolds 'orthotide' functions are explored in application to two typical sea-level series. Long-term fluctuations of their mean products prevent the direct application of simple methods of analysis, including the direct extraction of radiational tidal constants. Independence and stability of the orthoweights in the presence of radiational tides are demonstrated numerically. Orders 0 to 9 seem sufficient to define typical tidal properties, with the largest weights occurring at orders 0 to 5. The very simple procedure of converting orthoweights to admittances or harmonic constants is applied, with satisfactorily stable results. 相似文献
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塔克拉玛干沙漠不同矿化度水灌溉造林试验研究 总被引：12，自引：1，他引：11
为了开发利用塔里木沙漠公路沿线的地下咸水进行防护林建设,在塔克拉玛干沙漠北缘开展了不同矿化度水灌溉造林试验。在流动风沙十和荒漠林土两种类型的土壤上,各设计6个灌溉水矿化度梯度：2g/L、5g/L、10g/L、15g/L、20g/L、28g/L,选择了4种耐盐植物：梭梭柴、头状沙拐枣、盐穗木、沙枣,研究不同类型土壤上灌溉水矿化度对植物生长的影响。结果表明：(1)随着灌溉水矿化度的增加,植物成活率下降,除2g/L水灌溉的植物生长量略低于5～10g/L外。生长量也基本随灌溉水矿化度的增加而减小：(2)土壤类型对植物的生长也有较大影响,流动风沙土中植物的成活率和生长量总体上高于荒漠林土中植物的成活率和生长量;(3)从四种植物之间的对比来看,梭梭柴适应能力最好,盐穗木和头状沙拐枣次之,沙枣适应能力最差。 相似文献
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《干旱区地理》编辑部 《干旱区地理》2008,31(4)
2008年,我国在改革开放的大道上已经走过了三十年.三十年前的1978年中国正是处在文革浩劫之后百业凋敝、百废待举的时期.<干旱区地理>就在这个时期创刊的,她的创刊,是我国干旱区地学学术刊物发展的一个重要标志.三十年来编辑部全体成员在研究所领导的支持、关心和历届编委以及科技人员的指导、鼓励、帮助下,发扬艰苦奋斗,开拓创新精神,一步一个脚印地走到了今天,忆往昔感慨万千,三十年的辛勤耕耘,三十年的春花秋实,<干旱区地理>构建了能为广大科技工作者在干旱区地理领域展示科学研究,成果交流与信息共享平台. 相似文献
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Rebecca Maria Torres 《The Professional geographer》2019,71(1):161-166
In light of the grave challenges ahead under the Trump administration and the rise of right-wing populism in the West, it is critical that geographers across subdisciplines embrace activist and engaged scholarship. Opportunities for such engagement often emerge organically in our everyday lives at the intersection between personal interests, ethics and commitments, and nascent research agendas. In this article, I share two experiences with community-engaged and activist research: (1) establishing the Los Puentes Spanish–English dual-language immersion program in partnership with a low-income rural North Carolina public school system and (2) collaborating on the Building Austin, Building Injustice participatory action research project with a community-based workers center to document and lobby for improvements to construction workers’ conditions in Austin, Texas. Through a situated and positioned personal account, I seek to not only provide two examples of activist research but also illustrate the diversity of encounters and how they can emerge in unlikely places and outside conventional “activist” arenas. In conclusion, I draw on lessons learned through these experiences to reflect on the various challenges and opportunities for activist scholarship within geography in the future. 相似文献
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Thermal convection with non-Newtonian plates 总被引：1，自引：0，他引：1
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Smoothing seismic tomograms with alpha-trimmed means 总被引：1，自引：0，他引：1
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Summary. Certain associated fluctuations in geomagnetic records and infrasonic pressure variations at ground level noted at Hyderabad and Delhi are discussed with the help of simultaneous records taken during 1980. Typical infrasound signals are noted, apparently generated by the magnetic substorms in the auroral zones and travelling down to near tropical latitudes with speeds in the range of 400–500m s-1 . Characteristic signatures in infrasound records, corresponding to SSCs and storm time fluctuations are also noted, but only when substorms are associated with the storms. 相似文献
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Peta Wolifson 《Geographical review》2016,106(2):174-200
Nightlife settings both facilitate urban sociality and act as sites of social conflict, however little research has focused on experience and encounter in these places. This paper addresses this gap in the context of night‐time economic planning and recent research on encounter. The use of mobile methods in nightlife spaces is shown to garner a more nuanced understanding of how forays into planned night‐time spaces are experienced and understood by people using those spaces. I argue that emplaced, mobile methods unveil complex narratives of place, revealing prejudices and discourses at play in place. These narratives begin to erode privileged images of the city shaped by increasingly neoliberal governance and other cultural intermediaries, and draw out the potential of these methods to improve the lived inclusivity of place. 相似文献
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Teaching Geography's four traditions with Poetry 总被引：1，自引：1，他引：0
《The Journal of geography》2012,111(1):24-31
Abstract Poetry is a powerful form of writing that has received relatively little attention from geography educators. However, most poetry is imbued with explicit and vivid references to physical and human phenomena over space, and is thus a source of information that may help illustrate a variety of geographic concepts. This article uses William Pattison's four traditions of geography as a framework for illustrating the explicitly spatial concepts present in selected poetry. Through the poetry of authors like Walt Whitman, Robert Frost, and Maya Angelou, this work introduces a new perspective from which to teach and to learn familiar geographic themes. 相似文献
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