Ice regime of rivers in Latvia in relation to climatic variability
Ice regime of rivers in Latvia in relation to climatic variability
复制标题
拉脱维亚河流冰情与气候变化的关系
DOI：
10.1080/03680770.2006.11903004
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
T. Frisk
中科院分区：
文献类型：
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作者：
M. Kļaviņš;A. Briede;V. Rodinov;T. Frisk
河流的结冰和解冻记录有助于评估长期和季节性的气候变异性，特别是与气候变化相关的情况（利文斯通1997，辛格和库马尔1997，马格努森等人2000）。冰情研究很重要，因为：（1）在科学观测开始之前，许多河流就已经记录了湖泊和河流的结冰和解冻的日历日期，因此这些数据涵盖的时间比水文因素更长；（2）冰情模拟了大气降水积累后最大流量期间的水文状况；（3）冰情是气候敏感且可靠的指标。河流流量和冰情受到全球变暖过程的影响（辛格等人2000）。北半球河流过去两个世纪的结冰日期提供了一致的证据，表明结冰时间推迟，解冻时间提前（马格努森等人2000）。几项研究使用易于识别的参数分析了内陆水域的冰情趋势，这些参数描述了长时间记录的冰的解冻情况（本森等人2000，利肯斯2000，荒井2000）。此前，通过里加港冰解冻的历史时间序列对波罗的海的冰情进行了分析（耶夫列耶娃2001）以重建气候（塔兰德和诺德利2001）。本研究的目的是评估拉脱维亚河流的长期冰情变化与长期气候变化和河流流量的关系。
lee freeze-up and break-up reeords for rivers allow assessment of long-term and seasonal elimate variability, espeeially in relation to elimate ehange (LivINGSTONE 1997, SINGH & KUMAR 1997, MAGNUSON et al. 2000). lee regime studies are important beeause: (l) ealendar dates o f freezing and thawing o f lakes and rivers were reeorded for many rivers well before seientifie observations began, therefore the data eover a longer period than hydrologieal faetors; (2) iee regimes model the hydrologieal regime during the period o f maximal diseharge o f aeeumulated atmospherie preeipitation; and (3) iee eonditions are sensitive and reliable indieators of elimate. River diseharge and iee regime is influeneed by the global warming proeess (SINGH et al. 2000). lee dates for the last two eenturies on rivers in the Northem Hemisphere provide eonsistent evidenee of later freezing and earlier break-up (MAGNUSON et al. 2000). Several studies have analyzed iee regime trends for inland waters using easily identifiable parameters deseribing iee break-up reeorded for a long period of time (BENSON et al. 2000, LIKENS 2000, ARAI 2000). The iee regime ofthe Baltie Sea was previously analyzed using a historieal time series of iee break-up at the port o f Ri ga (JEVREJEVA 200 l) to reeonstruet the elimate (TARAND & NORDLI 2001). The aim ofthe present study is to assess long-term iee regime ehanges of Latvian rivers in relation to long-term elimate ehange and river diseharge.