751 
3').The dusty pollution has been a obviously pollu 
tion at present.And because of the background of 
meteorology in 2000 maybe have a bad effact on 
dusty pollution.it becomes a hard work to change 
the status quo of dusty pollution completely 
in 2000. 
4).The acid rain is most sulfate pollution at pre 
sent, in China. The nitrate radical level account 
for a low proportion. With the heavier S02 and 
NOx pollution.the action of nitrate will be more 
conspicuous than present. But it still can't 
change the pollution of sulfate type precipita 
tion. It will probably take further steps on acid 
rain. But because we still have limited knowle 
dges of acid rain, we should act with caution to 
detect the tendency of acid rain and intensify 
the monitoring with remote sensing technique on 
acid rain. 
5. THE PRESENT SITUATION AND THE FATURE 
OF CHINA AIR QUALITY MONITORING 
The environmental meeting which was convened by the 
U.N. in 1972 in Stockholm pushed the China environ 
ment protection work forward. In 1973, the first 
meeting of environmental protection convened, it 
begun on environment monitoring of China.After 1973, 
environmental monitoring stations were set up in 
many cities,these stations unfolded some monitoring 
jobs on air quality,water quality and noise etc..By 
the year of 1989, we have about 30,000 personnel in 
the field of monitoring, and 1,800 stations in dif 
ferent grade. Especially in 1980s, the professional 
contigent in monitoring field had increased from 
10,000 persons in the year 1980 to 30,000 persons 
in the year of 1989.To calculate the time according 
to the earliest air quality monitoring station, 
seventeen years had undergone till 1989. China Na 
tional Environmental Monitaring Centre! CNEMC ) was 
set up in 1980, after that four grade monitoring 
network in China came into being which take CNEMC 
as the key link. 
In the late years of 1980s, more than seventy 
stations in the nation-network which representive 
different kinds of cities and type of air pollution 
were selected, and their air environmental monitor 
ing results are the basic to reflect the situation 
of China urban air quality. 
In order to get in the reliable monitoring data the 
unite technical specification of nation-network was 
worked out so the comparable monitoring results in 
different cities was strengthened. The technical 
specification unified the technical requirement and 
the quality control in different steps, and 
strengthened the unity and representation of sampl 
ing, also the idea of the quality control on every 
processing. 
We have great progress in monitoring technology, 
too. from 1970s to 1980s, the whole country's urban 
air quality monitoring basically use the way of 
sample by hand : four times each day, 5-7 days each 
season. We can call this period as hand-sampling 
age. In the last years of 1980s, the technical spe 
cification stipulates that the stations in nation- 
network must, use the way of 24 hours continuous 
auto-sampling and analysis in laboratory. Now this 
method has come into use in some cities. In 1980s, 
air auto-monitoring systems were set up in some 
cities.All of these laid a faundation for the auto- 
sampling way of air quality monitoring. So we can 
say that the years of 1990s will be the era of 
auto-samp 1ing. 
Remote sensing technique has been used in the 
respect of environment, especially in the respect 
of water quality, resources, biological systems.The 
remote sensing technique has shown a great upper 
hand in the respect, of environmental observe and 
management,and it accumulate a great potentialities. 
In 1980s, China has begun to use sound radar remote 
sensing technique on observing the structure of 
lower atmosphere etc.. We should try to use the 
remote sensing technique on observing 03 in 1990s. 
We believe that with the development of economy and 
technology, the remote sensing technique in air 
quality monitoring will has a great development in 
China and it will become the main way of air qua 
lity monitoring. So we can predict that the years 
of 2000s will be the era of remote sensing monitor 
ing in environmental monitoring. 
Acknowledgements 
The author is deeply grateful to professor Z.Y.WU 
and professor Z.F.CHENG, for their valuable advice. 
Thanks are also due to Mrs.X.L.LIU and Mr.S.X.HONG 
for providing their research report, and thanks 
Mr.Q,Y.LIU, Mr.X.W.WANG and Mrs.W.LIU, CEPA, for 
providing data. This paper was supported by 
Mrs.H.H.LIU, Mrs.Y.F.LIN, Mr.S.LI, Mr.Y.D.ZHU and 
Mr.T.Z.QIAN. 
REFERENCES 
•••References from GREY LITERATURE: 
LIU, X.L., and HONG, S.X., 1987. Tendency 
prediction of NOx in China by the year of 2000. 
Report, CHINESE RESEARCH ACADEMY OF ENVIRONMENTAL 
SCIENCE ( CRAES ) Beijing China. 
-•■References from BOOKS: 
QH, G.P., et al, 1989. Chinese environment in 
2000. SOCIO-SCIENCE OF CHINA. Beijing China. 
-•-Reference from GOVERMENT REPORT: 
U.S. EPA, 1986. National air quality and emissions 
trends report,1984.Annual Report, U.S.EPA.Research 
Triangle Park,NC.Publication No.EPA-450/4-1986-001. 
-•-References from JOURNALS: 
WANG, M.X., CHENG, C.M., and WANG, R.B., 1986 . 
The optimum dessign research of national atmo 
spheric environmental monitoring network. ENVIR. 
MONITORING IN CHINA. 1986 (4). Beijing China. 
-References from GREY LITERATURE; 
WANG, W.X., et al, 1987. Environment prediction 
and counter measure of China in 2000. Report, 
( CRAES ) Beijing China. 
-References from GREY LITERATURE: 
WU, Z.Y., 1989. The national environment quality 
from 1983 to 1988. Report, (CNEMC) Beijing China. 
-References from GREY LITERATURE: 
ZHAO, D.W., et al, 1987. The study of S02 and 
acid rain trend predicting by the year of 2000. 
Report, ( CRAES ) Beijing China.