scholarly journals Objective Estimation of Tropical Cyclone Intensity from Active and Passive Microwave Remote Sensing Observations in the Northwestern Pacific Ocean

2019 ◽  
Vol 11 (6) ◽  
pp. 627 ◽  
Author(s):  
Kunsheng Xiang ◽  
Xiaofeng Yang ◽  
Miao Zhang ◽  
Ziwei Li ◽  
Fanping Kong
Keyword(s):  
Pacific Ocean ◽  
Tropical Cyclone ◽  
Surface Wind ◽  
Microwave Remote Sensing ◽  
Absolute Error ◽  
Training Data ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
Estimation Model ◽  
China Meteorological Administration

A method of estimating tropical cyclone (TC) intensity based on Haiyang-2A (HY-2A) scatterometer, and Special Sensor Microwave Imager and Sounder (SSMIS) observations over the northwestern Pacific Ocean is presented in this paper. Totally, 119 TCs from the 2012 to 2017 typhoon seasons were selected, based on satellite-observed data and China Meteorological Administration (CMA) TC best track data. We investigated the relationship among the TC maximum-sustained wind (MSW), the microwave brightness temperature (TB), and the sea surface wind speed (SSW). Then, a TC intensity estimation model was developed, based on a multivariate linear regression using the training data of 96 TCs. Finally, the proposed method was validated using testing data from 23 other TCs, and its root mean square error (RMSE), mean absolute error (MAE), and bias were 5.94 m/s, 4.62 m/s, and −0.43 m/s, respectively.

New Climate Diagnostic Method of Activity of Typhoons over the Northwestern Pacific Ocean

2011 ◽  
Vol 71-78 ◽  
pp. 3118-3122 ◽  
Author(s):  
Ji Qing Tan ◽  
Hui Qi Li ◽  
Zhao Xia Zheng
Keyword(s):  
Pacific Ocean ◽  
Diagnostic Method ◽  
Computational Method ◽  
Northwestern Pacific ◽  
Direct Impact ◽  
Northwestern Pacific Ocean ◽  
China Meteorological Administration ◽  
Fortran Compiler ◽  
Impact Area ◽  
South Of Japan

A new conception, called the Most Direct Impact Area (MDIA) of typhoons, is put forward in this paper. After the computational method is explained in detail, the databank of 1955 typhoons of China Meteorological Administration (CMA) have been calculated on the Linux operational platform with a Fortran compiler in a computer. The results via calculating the geographic distribution of the MDIA of typhoons show that the characteristic of typhoon activity in a year can be easily identified in quantity. A most interesting feature has been found that typhoon activity is abnormally active over the ocean to the south of Japan in three typical El Niño years.

Major and trace element compositions and resource potential of ferromanganese crust at Takuyo Daigo Seamount, northwestern Pacific Ocean

2016 ◽  
Vol 50 (6) ◽  
pp. 527-537 ◽  
Author(s):  
Tatsuo Nozaki ◽  
Ayaka Tokumaru ◽  
Yutaro Takaya ◽  
Yasuhiro Kato ◽  
Katsuhiko Suzuki ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Trace Element ◽  
Ferromanganese Crust ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
Resource Potential

scholarly journals Characterization of Bacterial Communities in Bioaerosols over Northern Chinese Marginal Seas and the Northwestern Pacific Ocean in Spring

2019 ◽  
Vol 58 (4) ◽  
pp. 903-917 ◽  
Author(s):  
Manman Ma ◽  
Yu Zhen ◽  
Tiezhu Mi
Keyword(s):  
Pacific Ocean ◽  
Yellow Sea ◽  
Bacterial Communities ◽  
Bohai Sea ◽  
The Yellow Sea ◽  
Northwestern Pacific ◽  
Particle Sizes ◽  
Marine Aerosols ◽  
Northwestern Pacific Ocean ◽  
The Bohai Sea

AbstractStudies of the community structures of bacteria in marine aerosols of different particle sizes have not been reported. Aerosol samples were collected using a six-stage bioaerosol sampler over the Bohai Sea, the Yellow Sea, and northwestern Pacific Ocean in the spring of 2014. The diversity and composition of these samples were investigated by Illumina high-throughput sequencing, and 130 genera were detected in all of the samples; the most abundant bacterial genus was Bacteroides, followed by Prevotella and Megamonas. The Chao1 and Shannon diversity indices ranged from 193 to 1044 and from 5.44 to 8.33, respectively. The bacterial community structure in coarse particles (diameter larger than 2.1 μm) was more complex and diverse than that in fine particles (diameter less than 2.1 μm) in marine bioaerosols from over the Yellow Sea and northwestern Pacific Ocean, while the opposite trend was observed for samples collected over the Bohai Sea. Although we were sampling over marine regions, the sources of the bioaerosols were mostly continental. Temperature and wind speed significantly influenced the bacterial communities in marine aerosols of different particle sizes. There may be a bacterial background in the atmosphere in the form of several dominant taxa, and the bacterial communities are likely mixed constantly during transmission.

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