利用NCEP/NCAR(美国国家环境预报中心/国家大气研究中心)的全球预报系统(GFS)再分析资料、欧洲气象中心(ERA-interim)资料以及中国气象局观测站点的实况降水观测结合CMORPH卫星反演降水资料,对2014年第10号台风Matmo生成后西北行并登陆...利用NCEP/NCAR(美国国家环境预报中心/国家大气研究中心)的全球预报系统(GFS)再分析资料、欧洲气象中心(ERA-interim)资料以及中国气象局观测站点的实况降水观测结合CMORPH卫星反演降水资料,对2014年第10号台风Matmo生成后西北行并登陆台湾及福建过程中的特征进行了分析,揭示出Matmo移动路径主要受西太平洋副热带高压(简称西太副高)外围引导气流影响。动、热力物理量场分析表明,Matmo在登陆福建前后,福建上空一直维持深厚的涡旋结构,福建东南部上空的上升区与台湾海峡及福建西部附近的下沉运动区形成明显的垂直环流圈。同时,南海上空有明显的西南急流(风速大于16 m s^(-1)),Matmo的水汽来源主要有两条,分别为孟加拉湾和南海以及西太副高南侧。充足的水汽输送及低层水汽辐合抬升有利于Matmo登陆后的强降水发生和维持。Matmo登陆福建后仍然保持低层辐合、高层辐散,有利于持续暴雨的发生。Matmo登陆福建期间始终处于风速垂直切变小值区(小于9 m s^(-1))中,环境风速的弱垂直切变有利于Matmo暖心结构及高空辐散形势的维持,是Matmo在登陆后依然能维持自身强度不衰减的原因之一。展开更多
The typhoon process has a significant influence on the distribution of heavy metals in sediments.Based on the heavy metal(V,Cr,Co,Ni,Cu,Zn,Pb,and Mn)contents in surface sediments collected under normal conditions and ...The typhoon process has a significant influence on the distribution of heavy metals in sediments.Based on the heavy metal(V,Cr,Co,Ni,Cu,Zn,Pb,and Mn)contents in surface sediments collected under normal conditions and post-typhoon Matmo in Quanzhou Bay in 2014,the distributions,sources,and impacts of typhoon processes on heavy metals and pollution conditions were studied and discussed.The results showed that the heavy metals can be divided into two categories:Class I metals(Cu,Zn,Pb,and Mn)were mainly distributed in the estuary and significantly increased after the typhoon,and Class II metals(V,Cr,Co,and Ni)were distributed in the coastal intertidal zone and estuary and remained unchanged or decreased after the typhoon.The heavy metal assessment showed that heavy metal pollution in Quanzhou Bay was serious and tended to increase after the typhoon.The increased metal supply and enhanced riverine and tidal hydrodynamics after the typhoon may be the main factors influencing the variations in heavy metal content and distribution.This study provided a basis for the accurate evaluation and scientific management of heavy metal pollution caused by typhoon processes in Quanzhou Bay.展开更多
文摘利用NCEP/NCAR(美国国家环境预报中心/国家大气研究中心)的全球预报系统(GFS)再分析资料、欧洲气象中心(ERA-interim)资料以及中国气象局观测站点的实况降水观测结合CMORPH卫星反演降水资料,对2014年第10号台风Matmo生成后西北行并登陆台湾及福建过程中的特征进行了分析,揭示出Matmo移动路径主要受西太平洋副热带高压(简称西太副高)外围引导气流影响。动、热力物理量场分析表明,Matmo在登陆福建前后,福建上空一直维持深厚的涡旋结构,福建东南部上空的上升区与台湾海峡及福建西部附近的下沉运动区形成明显的垂直环流圈。同时,南海上空有明显的西南急流(风速大于16 m s^(-1)),Matmo的水汽来源主要有两条,分别为孟加拉湾和南海以及西太副高南侧。充足的水汽输送及低层水汽辐合抬升有利于Matmo登陆后的强降水发生和维持。Matmo登陆福建后仍然保持低层辐合、高层辐散,有利于持续暴雨的发生。Matmo登陆福建期间始终处于风速垂直切变小值区(小于9 m s^(-1))中,环境风速的弱垂直切变有利于Matmo暖心结构及高空辐散形势的维持,是Matmo在登陆后依然能维持自身强度不衰减的原因之一。
基金supported by the Scientific Research Foundation of the Third Institute of Oceanography,Ministry of Natural Resources(Nos.TIO2015014 and TIO2014016)the National Programme on Global Change and Air-Sea Interaction(No.GASI-GEOGE-03)the National Science Foundation of China(NSFC,No.41676028).
文摘The typhoon process has a significant influence on the distribution of heavy metals in sediments.Based on the heavy metal(V,Cr,Co,Ni,Cu,Zn,Pb,and Mn)contents in surface sediments collected under normal conditions and post-typhoon Matmo in Quanzhou Bay in 2014,the distributions,sources,and impacts of typhoon processes on heavy metals and pollution conditions were studied and discussed.The results showed that the heavy metals can be divided into two categories:Class I metals(Cu,Zn,Pb,and Mn)were mainly distributed in the estuary and significantly increased after the typhoon,and Class II metals(V,Cr,Co,and Ni)were distributed in the coastal intertidal zone and estuary and remained unchanged or decreased after the typhoon.The heavy metal assessment showed that heavy metal pollution in Quanzhou Bay was serious and tended to increase after the typhoon.The increased metal supply and enhanced riverine and tidal hydrodynamics after the typhoon may be the main factors influencing the variations in heavy metal content and distribution.This study provided a basis for the accurate evaluation and scientific management of heavy metal pollution caused by typhoon processes in Quanzhou Bay.
