Temporal-Spatial Variation Characteristics of Acid Rain during 2007 to 2012 in Fujian Province

2014 ◽  
Vol 1010-1012 ◽  
pp. 462-466
Author(s):  
Bin Bin Chen ◽  
Kai Yang ◽  
Qiu Ping Zheng ◽  
Wen Lin ◽  
Hong Wang
Keyword(s):  
Spatial Variation ◽  
Acid Rain ◽  
Strong Acid ◽  
Seasonal Distribution ◽  
Observation Data ◽  
Meteorological Observation ◽  
Fujian Province ◽  
Rain Area ◽  
Variation Characteristics ◽  
Precipitation Acidity

Based on the meteorological observation data of 4 acid rain monitoring stations (Shaowu Station, Fuzhou Station, Yong’an Station and Xiamen Station) during 2007 to 2012 in Fujian Province, the characteristics of the acid rain were analyzed. The results showed that acid rain pollution was common in Fujian Province while showing a reducing trend overall. The time from 2007 to 2010 was acid rain pollution period of large precipitation acidity and high strong acid rain frequency. And the time from 2011 to 2012 was acid rain improving period with precipitation acidity weakening and strong acid rain frequency declining. It showed an obviously seasonal feature for acid rain. Acid rain pollution was relatively heavy in winter while light in summer in Fuzhou, Shaowu and Xiamen. But the seasonal distribution in Yong’an was just the opposite. There were large differences in the degree of acid rain pollution in different regions. The acid rain pollution in Shaowu was heaviest belonging to the strong acid rain area. And the second was Fuzhou belonging to the moderate acid rain area. Xiamen and Yong’an belonged to the light acid rain area with lighter pollution. The acid rain pollution showed various degrees of improvements in Shaowu, Fuzhou and Xiamen. Especially in Fuzhou the improvement was particularly evident as the best condition in recent years. While in Yong’an the acid rain pollution had aggravated somewhat in recent years with the acid rain frequency increasing and the precipitation acidity enhancing.

scholarly journals The precipitation chemistry and acidity over China during 2018

2019 ◽  
Vol 136 ◽  
pp. 06020 ◽  
Author(s):  
Xiaofang Jia ◽  
Jie Tang ◽  
Yong Zhang
Keyword(s):  
Acid Rain ◽  
Ph Value ◽  
Southern China ◽  
Eastern China ◽  
Precipitation Chemistry ◽  
Hunan Province ◽  
Observation Data ◽  
Rain Area ◽  
Chemistry Data ◽  
Precipitation Ph

This paper reports the acid rain observation data from 376 Acid Rain Monitoring stations and the precipitation chemistry data from 5 Global Atmosphere Watch stations of China Meteorological Administration(CMA) during 2018. The variation characteristics of acid rain in China and that of precipitation chemistry in Eastern China are discussed. The results show that the acid rain area in China is mainly distributed in the Southeast and South of China and dispersively in North and Southwest of China. Heavy acid rain area is only limited in Eastern part of Hunan province. The annual mean precipitation pH value of all stations in 2018 ranges from 3.73 to 8.07 and the national annual mean precipitation pH value is 5.94, which is higher than those of 2010-2017. The national annual mean precipitation conductivity is 47.7 μS·cm-1 with the higher conductivity in Northern China and lower in Southern China. Compared with 2010-2017, the acid rain pollution situation over China has been improving nationwide. The precipitation chemistry data shows that the concentration of sulfate is close to nitrate in precipitation and keeps decreasing in recent years.

scholarly journals Recent Changes in Temperature and Precipitation of the Summer and Autumn Seasons over Fujian Province, China

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1900
Author(s):  
Zhiguo Ma ◽  
Qinyu Guo ◽  
Feiyue Yang ◽  
Huiling Chen ◽  
Wenqing Li ◽  
...  
Keyword(s):  
Periodic Variation ◽  
Annual Precipitation ◽  
Trend Test ◽  
Observation Data ◽  
Fujian Province ◽  
Average Temperature ◽  
Temperature And Precipitation ◽  
Seasonal Oscillation ◽  
Variation Characteristics ◽  
Major Cycle

Based on the observation data of daily temperature and precipitation in summer and autumn of 68 representative meteorological stations in Fujian Province from 1971 to 2018, using the climate Tendency Rate, Mann-Kendall trend test, Morlet wavelet analysis and other methods, this paper analyzes the variation trends of air temperature and annual precipitation and the wavelet periodic variation characteristics of annual precipitation time series in summer and autumn of Fujian Province over a period of approximately 48 years. The results show that over the approximately 48 years, the temperature and precipitation in summer and autumn in Fujian showed an obvious upward trend, which had a mutation around 2000, but the mutation time was different, and the precipitation was slightly earlier. The annual temperature and precipitation in summer and autumn experienced three oscillations on the 28a scale. In the 28a time scale of summer autumn seasonal oscillation, there are three negative centers and two positive centers. According to the characteristics of annual average temperature and annual precipitation in the first major cycle, the annual precipitation in summer and autumn will continue to increase in the future.

Function of coprophagous beetles (Coleoptera: Scarabaeidae, Geotrupidae, Hydrophilidae) in cattle pastures inferred from pitfall trapping data

2010 ◽  
Vol 27 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Martin Šlachta ◽  
Jan Frelich ◽  
Tomáš Tonka
Keyword(s):  
Seasonal Variation ◽  
Spatial Variation ◽  
Dry Weight ◽  
Seasonal Distribution ◽  
The Other ◽  
Pitfall Trapping ◽  
Other Hand ◽  
Nested Anova ◽  
Species Groups ◽  
Dung Decomposition

Function of coprophagous beetles (Coleoptera: Scarabaeidae, Geotrupidae, Hydrophilidae) in cattle pastures inferred from pitfall trapping dataAn analysis of data on the dry weight biomass of coprophagous beetles in standardized dung (4.5 l) was conducted in order to characterize the spatial and the seasonal distribution of the beetles' biomass in cattle pastures and to elucidate their function in dung decomposition. Nested Anova with factors of farm, site (nested in farm), seasonal period and year was used to evaluate the effect of these factors on the biomass of four functional species groups: the dung dwellers ofScarabaeidae(subfamilyAphodiinae), the dung dwellers ofHydrophilidae, the small tunnellers ofScarabaeidae(subfamilyCoprinae) and the large tunnellers ofGeotrupidae. The spatial variation of biomass (between the sites and the farms) was insignificant (P>0.05) in the two dung-dweller groups and in the large-tunnellers group. On the other hand, a significant (P<0.05) seasonal variation of biomass was found in all but the large tunneller group. In dung dwellers, the spring biomass was formed mainly by two species,Aphodius prodromusandA. sphacelatus. In summer, most of the biomass was accounted for bySphaeridium lunatum, S. scarabaeoidesandA. rufipes. In the two tunneller groups,Onthophagus fracticornis, Geotrupes stercorariusandG. spinigerformed a majority of the biomass in dung.

scholarly journals Temporal and spatial variation characteristics of temperature and its impact on grain production in Northeast China in recent 50 years

2021 ◽  
Author(s):  
Weiping Yan ◽  
Hongxiang Zhao ◽  
Lihua Zhang ◽  
Chen Xu ◽  
Guobo Tan ◽  
...  
Keyword(s):  
Spatial Variation ◽  
Northeast China ◽  
Regional Differences ◽  
Warming Trend ◽  
Grain Production ◽  
Temporal And Spatial Variation ◽  
Average Wind Speed ◽  
Variation Characteristics ◽  
Temporal And Spatial ◽  
The Impact

Abstract Climate warming has a great impact on grain production in northeast China, but there are few studies on the temporal and spatial variation characteristics of annual Tmean (mean temperature), the impact of meteorological factors on Tmean, and the impact of Tmean increase on grain production in northeast China. This study found that annual Tmean decreased from southeast to northwest in Northeast China, and there were regional differences in spatial distribution. The annual Tmean isoline in Northeast China moves obviously from southeast to northwest. The annual warming trend of Tmean was significant from 1971 to 2000, and moderated from 2001 to 2020. In recent 50 years, Tmean had obvious periodic changes. In the mid-late 1980s, annual Tmean had a sudden warming change, and since then it has been rising continuously. Sunshine hours, average wind speed, evaporation and average air pressure had a very significant correlation with Tmean. In conclusion, the climate change in northeast China in the past 50 years has an obvious warming and drying trend, and there are regional differences in the warming and drying. The warming and drying climate has brought challenges to agricultural production and food security in Northeast China. However, the negative effects of grain production reduction caused by warming and drying climate can be avoided to a certain extent if we deal with it properly.

Spatial Variation of Soil Organic Matter in Gully Bed with the Seabuckthorn Flexible Dam: A Case Study of EG1 in Zhun-Ge-Er County of Inner Mongolia, China

2014 ◽  
Vol 1073-1076 ◽  
pp. 619-627
Author(s):  
Fang She Yang ◽  
Shu Zhen Su ◽  
Juan Juan Zhang ◽  
Ci Fen Bi
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Spatial Autocorrelation ◽  
Spatial Variation ◽  
Inner Mongolia ◽  
Small Scale ◽  
Obvious Effect ◽  
Small Catchment ◽  
Variation Characteristics ◽  
Random Variation

In this paper, based on geostatistics and GIS techniques, spatial variation characteristics of soil organic matter (acronym: SOM) on a small scale were analyzed and discussed in east-one-branch gully (EG1) bed with the seabuckthorn flexible dam and the contrastive gully bed (which is non-vegetated any vegetation) located in zhun-ge-er county, Erdos, inner Mongolia, which belongs to the typical Pisha Sandstone area. The results show that the seabuckthorn can significantly increase SOM in the small catchment gully bed in the Pisha sandstone area, and the mean SOM content in gully bed with the seabuckthorn flexible dam is approximate 1.75 times that in the contrastive gully. Apparent spatial variation characteristics of SOM were found in the gully with the seabuckthorn flexible dam and the contrastive gully bed, moreover, the medium spatial autocorrelation of SOM was detected in gully bed with the seabuckthorn flexible dam, and the spatial variation of SOM was together led to by the structural and random variation at 1-6.5 m range, and of which the random variation accounts for 40%. Additional, the spatial autocorrelation of SOM in the contrastive gully bed is higher, the spatial variation of SOM was dominantly brought about by the structural variation at 1-4.5 m range, and of which the random variation accounts for 37%. Furthermore, the fractal dimension values reveal that dependence of SOM of the gully bed with the seabuckthorn flexible dam on spatial is weaker than that of the contrastive gully bed. It is judged that the seabuckthorn has an obvious effect on spatial distribution patterns and heterogeneity of SOM on a small scale.

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