Nonmethane hydrocarbons in the transported and local air masses at a clean remote site on Hainan Island, south China

2007 ◽  
Vol 112 (D14) ◽  
Author(s):  
Jian-Hui Tang ◽  
Lo-Yin Chan ◽  
Chuen-Yu Chan ◽  
Yok-Sheung Li ◽  
Chih-Chung Chang ◽  
...  
Keyword(s):  
South China ◽  
Hainan Island ◽  
Nonmethane Hydrocarbons ◽  
Remote Site ◽  
Air Masses

scholarly journals Evaluation of HRCLDAS and ERA5 Datasets for Near-Surface Wind over Hainan Island and South China Sea

Atmosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 766
Author(s):  
Yi Jiang ◽  
Shuai Han ◽  
Chunxiang Shi ◽  
Tao Gao ◽  
Honghui Zhen ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Surface Wind ◽  
Hainan Island ◽  
The South China Sea ◽  
Wind Data ◽  
The South ◽  
Near Surface ◽  
China Sea

Near-surface wind data are particularly important for Hainan Island and the South China Sea, and there is a wide range of wind data sources. A detailed understanding of the reliability of these datasets can help us to carry out related research. In this study, the hourly near-surface wind data from the High-Resolution China Meteorological Administration (CMA) Land Data Assimilation System (HRCLDAS) and the fifth-generation ECMWF atmospheric reanalysis data (ERA5) were evaluated by comparison with the ground automatic meteorological observation data for Hainan Island and the South China Sea. The results are as follows: (1) the HRCLDAS and ERA5 near-surface wind data trend was basically the same as the observation data trend, but there was a smaller bias, smaller root-mean-square errors, and higher correlation coefficients between the near-surface wind data from HRCLDAS and the observations; (2) the quality of HRCLDAS and ERA5 near-surface wind data was better over the islands of the South China Sea than over Hainan Island land. However, over the coastal areas of Hainan Island and island stations near Sansha, the quality of the HRCLDAS near-surface wind data was better than that of ERA5; (3) the quality of HRCLDAS near-surface wind data was better than that of ERA5 over different types of landforms. The deviation of ERA5 and HRCLDAS wind speed was the largest along the coast, and the quality of the ERA5 wind direction data was poorest over the mountains, whereas that of HRCLDAS was poorest over hilly areas; (4) the accuracy of HRCLDAS at all wind levels was higher than that of ERA5. ERA5 significantly overestimated low-grade winds and underestimated high-grade winds. The accuracy of HRCLDAS wind ratings over the islands of the South China Sea was significantly higher than that over Hainan Island land, especially for the higher wind ratings; and (5) in the typhoon process, the simulation of wind by HRCLDAS was closer to the observations, and its simulation of higher wind speeds was more accurate than the ERA5 simulations.

Middle Devonian-Tournaisian rocks and biota on Hainan Island, South China

2013 ◽  
Vol 56 (11) ◽  
pp. 1934-1941
Author(s):  
RenJie Zhang ◽  
HuaZhou Yao ◽  
JianXiong Wang ◽  
Bing Tu
Keyword(s):  
South China ◽  
Middle Devonian ◽  
Hainan Island

scholarly journals Newly discovered seagrass beds and their potential for blue carbon in the coastal seas of Hainan Island, South China Sea

2017 ◽  
Vol 125 (1-2) ◽  
pp. 513-521 ◽  
Author(s):  
Zhijian Jiang ◽  
Songlin Liu ◽  
Jingping Zhang ◽  
Chunyu Zhao ◽  
Yunchao Wu ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Hainan Island ◽  
Blue Carbon ◽  
Seagrass Beds ◽  
China Sea

Morphology and molecular phylogeny of Ostreopsis cf. ovata and O. lenticularis (Dinophyceae) from Hainan Island, South China Sea

2017 ◽  
Vol 66 (1) ◽  
pp. 3-14 ◽  
Author(s):  
Hua Zhang ◽  
Songhui Lu ◽  
Yang Li ◽  
Jingyi Cen ◽  
Hualong Wang ◽  
...  
Keyword(s):  
South China Sea ◽  
Molecular Phylogeny ◽  
South China ◽  
Hainan Island ◽  
China Sea

scholarly journals Increasing surface ozone concentrations in the background atmosphere of Southern China, 1994–2007

2009 ◽  
Vol 9 (16) ◽  
pp. 6217-6227 ◽  
Author(s):  
T. Wang ◽  
X. L. Wei ◽  
A. J. Ding ◽  
C. N. Poon ◽  
K. S. Lam ◽  
...  
Keyword(s):  
Hong Kong ◽  
South China ◽  
Surface Ozone ◽  
Eastern China ◽  
Rate Of Change ◽  
Urban Site ◽  
Coastal Regions ◽  
Air Masses ◽  
Background Ozone ◽  
Rate Of Increase

Abstract. Tropospheric ozone is of great importance with regard to air quality, atmospheric chemistry, and climate change. In this paper we report the first continuous record of surface ozone in the background atmosphere of South China. The data were obtained from 1994 to 2007 at a coastal site in Hong Kong, which is strongly influenced by the outflow of Asian continental air during the winter and the inflow of maritime air from the subtropics in the summer. Three methods are used to derive the rate of change in ozone. A linear fit to the 14-year record shows that the ozone concentration increased by 0.58 ppbv/yr, whereas comparing means in years 1994–2000 and 2001–2007 gives an increase of 0.87 ppbv/yr for a 7-year period. The ozone changes in air masses from various source regions are also examined. Using local wind and carbon monoxide (CO) data to filter out local influence, we find that ozone increased by 0.94 ppbv/yr from 1994–2000 to 2001–2007 in air masses from Eastern China, with similar changes in the other two continent-influenced air-mass groups, but no statistically significant change in the marine air. An examination of the nitrogen dioxide (NO2) column obtained from GOME and SCIAMACHY reveals an increase in atmospheric NO2 in China's three fastest developing coastal regions, whereas NO2 in other parts of Asia decreased during the same period, and no obvious trend over the main shipping routes in the South China Sea was indicated. Thus the observed increase in background ozone in Hong Kong is most likely due to the increased emissions of NO2 (and possibly volatile organic compounds (VOCs) as well) in the upwind coastal regions of mainland China. The CO data at Hok Tsui showed less definitive changes compared to the satellite NO2 column. The increase in background ozone likely made a strong contribution (81%) to the rate of increase in "total ozone" at an urban site in Hong Kong, suggesting the need to consider distant sources when developing long-term strategies to mitigate local ozone pollution.

Metallogeny of the Shilu Fe–Co–Cu deposit, Hainan Island, South China: Constraints from fluid inclusions and stable isotopes

2014 ◽  
Vol 57 ◽  
pp. 351-362 ◽  
Author(s):  
Jinjie Yu ◽  
Jingwen Mao ◽  
Fuxiong Chen ◽  
Yonghui Wang ◽  
Linrui Che ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Fluid Inclusions ◽  
South China ◽  
Hainan Island

Legacy and emerging contaminants in coastal surface sediments around Hainan Island in South China

Chemosphere ◽  
2019 ◽  
Vol 215 ◽  
pp. 133-141 ◽  
Author(s):  
Ling Mo ◽  
Jing Zheng ◽  
Ting Wang ◽  
Yun-Gang Shi ◽  
Biao-Juan Chen ◽  
...  
Keyword(s):  
South China ◽  
Emerging Contaminants ◽  
Surface Sediments ◽  
Hainan Island
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