ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Volume 22,Issue 7,1996 Table of Contents
1996, 22(7):3-5.
DOI: 10.7519/j.issn.1000-0526.1996.07.001
Abstract:
Applying two schemes by Shukla (1974) and Endlich (1967) to separate the horizontal wind into its divergent and rotational components,time-area averaged values of budget terms of KD and KR were calculated. The results show that there are agreement in the signs and rnagnitudes of budget terms. Thus,it does not affect the comparision.
Applying two schemes by Shukla (1974) and Endlich (1967) to separate the horizontal wind into its divergent and rotational components,time-area averaged values of budget terms of KD and KR were calculated. The results show that there are agreement in the signs and rnagnitudes of budget terms. Thus,it does not affect the comparision.
1996, 22(7):6-11.
DOI: 10.7519/j.issn.1000-0526.1996.07.002
Abstract:
A study of missing data reconstruction and predictability for precipitation in Beijing is completed in the period of 1841-1980. The new variable of precipitation with nonlinear transform has been done for following Gauss distribution. Further the method of stepwise regression with minimum of forecast error has been employed for reconstructing the missing data using the data of temperature and precipitation in earlier months and years as predictors. Three experimental schemes of using only precipitations or the composite of temperature and precipitation and sample insert value between data are adopted. The results show that the scherne of using the composite factors of temperature and precipitation has good predictability. The missing data in the period has been reconstructed.
A study of missing data reconstruction and predictability for precipitation in Beijing is completed in the period of 1841-1980. The new variable of precipitation with nonlinear transform has been done for following Gauss distribution. Further the method of stepwise regression with minimum of forecast error has been employed for reconstructing the missing data using the data of temperature and precipitation in earlier months and years as predictors. Three experimental schemes of using only precipitations or the composite of temperature and precipitation and sample insert value between data are adopted. The results show that the scherne of using the composite factors of temperature and precipitation has good predictability. The missing data in the period has been reconstructed.
1996, 22(7):12-16.
DOI: 10.7519/j.issn.1000-0526.1996.07.003
Abstract:
Climate warming has important effects on fertilizer amount and efficiency in the soil. By the use of the soil fertilizer experiment under 3 urea levels with parting period,the changes of rapidly available nitrogen (N) content in the soil are measured and the responses of the soil fertilizer efficiency to temperature are studies. The results show that the release amount of N increases in the soil when temperature goes up , and the release period shortens when the release speed is up.When temperature increases 1℃,release amount of N enhances 4% on the average and release period shortens 3. 6 days. In addittion,the greater fertilizer amount,the more release amount of N is,and the quicker release speed will be. Therefore in conditions of climate warming, total is fertilizer amount and frequency should be increased relatively, but amount each time should be decreased,thereby enhancing fertilizer efficiency, reducing disadvantageous impact of climate warming on fertilizer efficiency.
Climate warming has important effects on fertilizer amount and efficiency in the soil. By the use of the soil fertilizer experiment under 3 urea levels with parting period,the changes of rapidly available nitrogen (N) content in the soil are measured and the responses of the soil fertilizer efficiency to temperature are studies. The results show that the release amount of N increases in the soil when temperature goes up , and the release period shortens when the release speed is up.When temperature increases 1℃,release amount of N enhances 4% on the average and release period shortens 3. 6 days. In addittion,the greater fertilizer amount,the more release amount of N is,and the quicker release speed will be. Therefore in conditions of climate warming, total is fertilizer amount and frequency should be increased relatively, but amount each time should be decreased,thereby enhancing fertilizer efficiency, reducing disadvantageous impact of climate warming on fertilizer efficiency.
4 Establishing the Index Sequence of the Drought-flood Disaster in the Laizhou Bay from 1470 to 1990
1996, 22(7):17-20.
DOI: 10.7519/j.issn.1000-0526.1996.07.004
Abstract:
Sequence about disastrous index,and numerical data bases of drought and flood were established for Laizhou Bay from 1470 to 1990,based on the analysis of historical documents and modern precipitation observational records by the advanced data base technology of Foxpro 2. 5. The sequence provides bases for analysising laws of occurrence and foreasting of drought and flood in the region.
Sequence about disastrous index,and numerical data bases of drought and flood were established for Laizhou Bay from 1470 to 1990,based on the analysis of historical documents and modern precipitation observational records by the advanced data base technology of Foxpro 2. 5. The sequence provides bases for analysising laws of occurrence and foreasting of drought and flood in the region.
5 The Distributive Characteristic of Precipitation in Shengzhong Reservoir and Its Effective Factors
1996, 22(7):21-25.
DOI: 10.7519/j.issn.1000-0526.1996.07.005
Abstract:
From three factors: valley's landforms, climatic changes and reservoir's effects, the cause is discussed that the Shengzhong reservoir in Sichuan province initially contains no enough water.Analytical result shows that there is no difference of the tendency distribution in space and time of the annual precipitation in the reservoir's location and nearby surrounding area. After its construction, the amount of precipitation around the reservoir is reduced that is less about 200mm than before. All the station's terrain around the reservoir is unchanged. After the reservoir storing water, the greatest impact is that the arnount of precipitation reduces nearly 40mm of points around it. There was a severe successive three-year drought after its construction. This suggests that the effect of climate on precipitation is much stronger than that of the reservoir. So climatic changes is the main cause that influences water amount of the reservoir during its initial use.
From three factors: valley's landforms, climatic changes and reservoir's effects, the cause is discussed that the Shengzhong reservoir in Sichuan province initially contains no enough water.Analytical result shows that there is no difference of the tendency distribution in space and time of the annual precipitation in the reservoir's location and nearby surrounding area. After its construction, the amount of precipitation around the reservoir is reduced that is less about 200mm than before. All the station's terrain around the reservoir is unchanged. After the reservoir storing water, the greatest impact is that the arnount of precipitation reduces nearly 40mm of points around it. There was a severe successive three-year drought after its construction. This suggests that the effect of climate on precipitation is much stronger than that of the reservoir. So climatic changes is the main cause that influences water amount of the reservoir during its initial use.
1996, 22(7):26-29.
DOI: 10.7519/j.issn.1000-0526.1996.07.006
Abstract:
Using the observed data of the total insolation in the experimental evaporation station of Duchang, Jiangxi province from 1980 to 1988,the calculation of the total insolation (at three time interval:a month,a dekad and a day) was conducted.
Using the observed data of the total insolation in the experimental evaporation station of Duchang, Jiangxi province from 1980 to 1988,the calculation of the total insolation (at three time interval:a month,a dekad and a day) was conducted.
1996, 22(7):30-32.
DOI: 10.7519/j.issn.1000-0526.1996.07.007
Abstract:
Analyses of the coherence between the physics factors and the heavy rain suggested the simple method of selecting predictors and sampled the history and the data in the sutnmer of 1994-1995. The results show that the ability of prediction model is strong.
Analyses of the coherence between the physics factors and the heavy rain suggested the simple method of selecting predictors and sampled the history and the data in the sutnmer of 1994-1995. The results show that the ability of prediction model is strong.
1996, 22(7):33-35.
DOI: 10.7519/j.issn.1000-0526.1996.07.008
Abstract:
The principle of the microband parametric amplifier of 713 radar is briefly presented. A methed adjusting the parametric amplifier is given to be used in the operation.
The principle of the microband parametric amplifier of 713 radar is briefly presented. A methed adjusting the parametric amplifier is given to be used in the operation.
1996, 22(7):36-39.
DOI: 10.7519/j.issn.1000-0526.1996.07.009
Abstract:
25 tornado events in Fujian Proviuce about a thousand years were analysed. The results show that, (1 ) tornado occured in both spring and summer,and its frequency is similar. 11 cases of 12 tornados since 1949 were at 13 to 18 o'clock (92% ),and the other was at 9 a. m. (8%);(2) tornado was of ten near the location of low pressure, high temperature and humidity, It was most accompanied by the cumulonimbus and strong wind above surface; (3) the systems induced 12 tornados were of typhoon (6 times,during July to September),cold front (4 times, May and June ),squall line (2 times, in April) and thundery cell (2 times);and (4) according to their intensity and damage,tornados accompaning typhoon and squall line were stronger than others.
25 tornado events in Fujian Proviuce about a thousand years were analysed. The results show that, (1 ) tornado occured in both spring and summer,and its frequency is similar. 11 cases of 12 tornados since 1949 were at 13 to 18 o'clock (92% ),and the other was at 9 a. m. (8%);(2) tornado was of ten near the location of low pressure, high temperature and humidity, It was most accompanied by the cumulonimbus and strong wind above surface; (3) the systems induced 12 tornados were of typhoon (6 times,during July to September),cold front (4 times, May and June ),squall line (2 times, in April) and thundery cell (2 times);and (4) according to their intensity and damage,tornados accompaning typhoon and squall line were stronger than others.
1996, 22(7):40-42.
DOI: 10.7519/j.issn.1000-0526.1996.07.010
Abstract:
The large-scale high temperature and drought weather occured in the Yangtze and Huaihe river valley,especially in the south of Jiangsu and Anhui province in 1994. It was concluded that its duration is only shorter than that in 1934, but longer than that in 1978. The following abnormal circulation situation was the main cause giving rise to such high temperature and drought weather. The Western Pacific sub-tropical high jumped to the region to the north of 27°N earlier to control the lower reaches of the Yangtze river in July. The typhoon moved westward more southerly and northward over the coastal water so that the continental high was steady in August. Meanwhile,another cause was that the westerly jet jumped northward quickly and maintained over the area from 42. 5°N to 47. 5°N after ending of the mei-yu period,therefore cool air moved more northerly.
The large-scale high temperature and drought weather occured in the Yangtze and Huaihe river valley,especially in the south of Jiangsu and Anhui province in 1994. It was concluded that its duration is only shorter than that in 1934, but longer than that in 1978. The following abnormal circulation situation was the main cause giving rise to such high temperature and drought weather. The Western Pacific sub-tropical high jumped to the region to the north of 27°N earlier to control the lower reaches of the Yangtze river in July. The typhoon moved westward more southerly and northward over the coastal water so that the continental high was steady in August. Meanwhile,another cause was that the westerly jet jumped northward quickly and maintained over the area from 42. 5°N to 47. 5°N after ending of the mei-yu period,therefore cool air moved more northerly.
1996, 22(7):43-45.
DOI: 10.7519/j.issn.1000-0526.1996.07.011
Abstract:
The satellite images of eight typhoons which influnced Heilongjiang province and caused heavy-torrential rain are analysed. The typhoons caused heavy rain in Heilongjiang province are divided into two patterns: (1 ) Typhoon cloud system combines with cold front system, (2) Typhoon lands and causes heavy rain directly.
The satellite images of eight typhoons which influnced Heilongjiang province and caused heavy-torrential rain are analysed. The typhoons caused heavy rain in Heilongjiang province are divided into two patterns: (1 ) Typhoon cloud system combines with cold front system, (2) Typhoon lands and causes heavy rain directly.
1996, 22(7):46-48.
DOI: 10.7519/j.issn.1000-0526.1996.07.012
Abstract:
ased on the data about waterlogging and drought, referring agricultural disasters,capability of preventing flood and developing feature of crops,the indexes on drought and waterlogging are determined for each season. The results show that,in the last 40 years or more,disastrous years exceeded the normal, and damages caused by waterlogging are more serious than that by drought. It is of momentous significance for adopting measures of defense,avoiding darnage and developing agriculture to understand and master the weather/climate regularity on drought and waterlogging.
ased on the data about waterlogging and drought, referring agricultural disasters,capability of preventing flood and developing feature of crops,the indexes on drought and waterlogging are determined for each season. The results show that,in the last 40 years or more,disastrous years exceeded the normal, and damages caused by waterlogging are more serious than that by drought. It is of momentous significance for adopting measures of defense,avoiding darnage and developing agriculture to understand and master the weather/climate regularity on drought and waterlogging.
1996, 22(7):52-56.
DOI: 10.7519/j.issn.1000-0526.1996.07.014
Abstract:
A new rocket WR-1B of anti-hail and artifical precipitation has been described with its structure, working and seeding process and superior feature and property to the gun “37”. Meanwhile,the technique and requirement for hail suppression by this rocket conducted by a radar has been expounded.
A new rocket WR-1B of anti-hail and artifical precipitation has been described with its structure, working and seeding process and superior feature and property to the gun “37”. Meanwhile,the technique and requirement for hail suppression by this rocket conducted by a radar has been expounded.
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ISSN:1000-0526 CN:11-2282/P