...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Rain-induced variability of near sea-surface T and S from drifter data
【24h】

Rain-induced variability of near sea-surface T and S from drifter data

机译：漂移数据对雨水引起的近海表面T和S的变化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effect of rain on sea surface temperature, salinity and density is examined using data of surface drifters in regions of the tropical oceans with large rainfall. In a few off-equatorial areas, there are sufficient drifter data to composite average daily cycles. There, the period of the day with largest salinity changes is associated with the largest rainfall rates and the lowest salinity. For a one-yearlong trajectory in the southwest Pacific, this results in an early morning salinity minimum, whereas the opposite is found close to equatorial West Africa. We then consider individual freshening events larger than 0.1 psu (averaging 0.56 psu at 50 cm), and find that they are often related with local rainfall, are associated with a surface cooling, and relax in a time inversely proportional to wind intensity. The temperature cooling is dependent on the time of day, but the freshening presents less daily cycle and the largest fast changes in salinity tend to be associated with the largest rainfall rates. When two measurement levels are available, the initial salinity signal is larger by more than 20% at the shallow depth (15 cm) compared with the deeper measurement level (near 50 cm), and the temperature and salinity gradients between the two levels are proportional (0.22°C for a 1% dilution).
机译：利用降雨大的热带海洋地区的表面漂流数据，研究了降雨对海面温度，盐度和密度的影响。在少数赤道地区，有足够的漂移数据来合成平均每日周期。那里，盐度变化最大的时段与最大的降雨率和最低的盐度相关。对于西南太平洋的一年轨迹，这导致清晨的最低盐度，而在赤道西非附近则发现相反的盐度。然后，我们考虑大于0.1 psu（在50 cm处平均0.56 psu）的单个新鲜事件，发现它们通常与局部降雨有关，与表面降温有关，并且在与风强度成反比的时间内松弛。温度的冷却取决于一天中的时间，但是新鲜度表现出更少的每日周期，并且最大的盐度快速变化往往与最大的降雨率有关。当有两个测量级别时，与较深的测量级别（接近50 cm）相比，浅深度（15 cm）处的初始盐度信号大20％以上，并且两个级别之间的温度和盐度梯度成比例（0.22°C稀释1％）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号