Chemical Composition of Precipitation, Throughfall and Soil Solutions at Two Forested Sites in Guangzhou, South China

2001 ◽  
pp. 1079-1084
Author(s):  
Y. G. Xu ◽  
G. Y. Zhou ◽  
Z. M. Wu ◽  
T. S. Luo ◽  
Z. C. He
Keyword(s):  
Chemical Composition ◽  
South China ◽  
Soil Solutions

scholarly journals Chemical composition, diurnal variation and sources of PM2.5 at two industrial sites of South China

2013 ◽  
Vol 4 (3) ◽  
pp. 298-305 ◽  
Author(s):  
Bo Huang ◽  
Ming Liu ◽  
Zhaofang Ren ◽  
Xinhui Bi ◽  
Guohua Zhang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Diurnal Variation ◽  
South China ◽  
Industrial Sites

Pyrobitumen in South China: Organic petrology, chemical composition and geological significance

2018 ◽  
Vol 188 ◽  
pp. 51-63 ◽  
Author(s):  
Chengyu Yang ◽  
Zhiyong Ni ◽  
Meijun Li ◽  
Tieguan Wang ◽  
Zhonghong Chen ◽  
...  
Keyword(s):  
Chemical Composition ◽  
South China ◽  
Geological Significance ◽  
Organic Petrology

The tektite problem

1937 ◽  
Vol 24 (156) ◽  
pp. 503-506 ◽  
Author(s):  
L. J. Spencer
Keyword(s):  
Chemical Composition ◽  
West Africa ◽  
South China ◽  
Ivory Coast ◽  
Volcanic Glass ◽  
Similar Material ◽  
Alluvial Deposits ◽  
East Indies ◽  
Dutch East Indies ◽  
Puzzling Problem

The natural glasses, found as small corroded pieces scattered on the earth's surface and in alluvial deposits in a few limited areas, have long presented a puzzling problem; and many theories have been propounded to explain their origin. They have been known in southern Bohemia and western Moravia since before 1787; and similar material has since been found in the Dutch East Indies, Malay States, Australia, Tasmania, French Indo-China, south China, Philippine Islands, and quite recently in the Ivory Coast in West Africa [M.A. 6-106]. These glasses are distinct in chemical composition from volcanic glass (obsidian), and there are no volcanoes in the districts where they are found. They have been given the names m oldavites, billitonites, austral ites, Darwin glass, indoch inites, rizalitcs [M.A. 4-422; 6-403], &c.

scholarly journals A REVIEW OF GLASS COMPOSITIONS AROUND THE SOUTH CHINA SEA REGION (THE LATE 1ST MILLENNIUM BC TO THE 1ST MILLENNIUM AD): PLACING IRON AGE GLASS BEADS FROM TAIWAN IN CONTEXT

2014 ◽  
Vol 34 ◽  
pp. 51 ◽  
Author(s):  
Kuan-Wen Wang ◽  
Caroline Jackson
Keyword(s):  
Chemical Composition ◽  
South China Sea ◽  
Southeast Asia ◽  
Iron Age ◽  
South China ◽  
Southern China ◽  
Temporal Patterns ◽  
Glass Beads ◽  
Chemical Analyses ◽  
Glass Compositions

With more published chemical analyses of glass beads in Southeast Asia and southern China in the last decade, it is becoming possible to discuss the regional and temporal patterns of prehistoric glass beads in these areas. This article focuses the 1st millennium AD, reviewing the chemical composition of glass in Taiwan, Southeast Asia and southern China, in an attempt to understand the potential relationships between the three regions.

scholarly journals In situ chemical measurement of individual cloud residue particles at a mountain site, South China

2017 ◽  
Author(s):  
Qinhao Lin ◽  
Guohua Zhang ◽  
Long Peng ◽  
Xinhui Bi ◽  
Xinming Wang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
South China ◽  
Chemical Properties ◽  
In Situ Observation ◽  
Mountain Range ◽  
Mixing State ◽  
Cloud Droplets ◽  
Air Masses ◽  
Aerosol Mass

Abstract. To estimate how atmospheric aerosol particles respond to chemical properties of cloud droplets, a ground-based counterflow virtual impactor (GCVI) coupled with a real-time single-particle aerosol mass spectrometer (SPAMS) was used to assess the chemical composition and mixing state of individual cloud residue particles in the Nanling Mountain Range (1,690 m a.s.l.), South China, in January 2016. The cloud residues were classified into nine particle types: Aged elemental carbon (EC), Potassium-rich (K-rich), Amine, Dust, Pb, Fe, Organic carbon (OC), Sodium-rich (Na-rich) and Other. The largest fraction of the cloud residues was the aged EC type (49.3 % by number), followed by the K-rich type (33.9 % by number). Abundant aged EC cloud residues that internally mixed with inorganic salts were found in air masses from northerly polluted areas. The number fraction (Nf) of the K-rich cloud residues significantly increased within southwesterly air masses from fire activities in Southeast Asia. In addition, the Amine particles represented 0.2 % to 15.1 % by number to the cloud residues when air masses changed from northerly to southwesterly sources. The Dust, Fe, Pb, Na-rich and OC particles had a low contribution (0.5–4.1 % by number) to the cloud residues. An analysis of the mixing state of cloud residues showed that the Dust and Na-rich cloud residues were highly associated with nitrate. Sulfate intensity increased in the aged EC and OC cloud residues and decreased in the Dust and Na-rich cloud residues relative to both ambient and interstitial particles. A comparison of cloud residues with interstitial particles indicated that a higher Nf for K-rich particles and a lower Nf for the aged EC particles were found in the cloud residues. Relative to the ambient and interstitial particles, the cloud residues exhibited larger size distributions. To our knowledge, this study is the first report on in situ observation of the chemical composition and mixing state of individual cloud residue particles in China. This study increases our understanding of the impacts of aerosols on cloud droplets in a remote area of China.

Sign in / Sign up

Export Citation Format

Share Document