Study on spring drought in cold and arid regions based on the ANOVA projection pursuit model
Due to the influence of snow cover and soil freeze–thaw processes in the early spring, the characteristics of spring drought in cold regions are different from those in other regions. This paper takes Qiqihar, a cold and semiarid grain production area in Northeast China, as the study area. Based on...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X24002292 |
| _version_ | 1827287486346297344 |
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| author | Wei Pei Lei Hao Qiang Fu Yongtai Ren Tianxiao Li |
| author_facet | Wei Pei Lei Hao Qiang Fu Yongtai Ren Tianxiao Li |
| author_sort | Wei Pei |
| collection | DOAJ |
| description | Due to the influence of snow cover and soil freeze–thaw processes in the early spring, the characteristics of spring drought in cold regions are different from those in other regions. This paper takes Qiqihar, a cold and semiarid grain production area in Northeast China, as the study area. Based on factors such as snow cover in the early spring period and precipitation, temperature, evapotranspiration, and soil moisture during the spring sowing period, a projection pursuit model with analysis of variance (ANOVA PPM) was used to analyze the spatiotemporal variation characteristics of regional spring drought. For the ANOVA PPM, based on the grouping of the projection points, local aggregation is measured by the mean square within groups, and overall dispersion is measured by the mean square between groups, thus achieving comparability and balance between overall dispersion and local aggregation. The spatial analysis of spring drought showed that, from a spatial perspective, there were significant spatial differences in spring drought in different subregions, and spring drought was closely related to latitude, with significant differences occurring at different latitudes. The northern region is relatively light, while the central and southern regions are more severe. From a temporal perspective, there are significant differences in spring droughts between different decades (1980 s, 1990 s, 2000 s and 2010 s). Overall, spring drought first intensifies and then decreases. |
| first_indexed | 2024-03-07T22:01:37Z |
| format | Article |
| id | doaj.art-e996d8e9418443a8b3b2758d3b2bb4f2 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-04-24T10:59:09Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-e996d8e9418443a8b3b2758d3b2bb4f22024-04-12T04:44:31ZengElsevierEcological Indicators1470-160X2024-03-01160111772Study on spring drought in cold and arid regions based on the ANOVA projection pursuit modelWei Pei0Lei Hao1Qiang Fu2Yongtai Ren3Tianxiao Li4College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, ChinaSchool of Water Conservancy & Civil Engineering, Northeast Agricultural University, Harbin 150030, ChinaSchool of Water Conservancy & Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Corresponding authors at: School of Water Conservancy & Civil Engineering, Northeast Agricultural University, Changjiang Street No. 600, Harbin, 150030, PR China.College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China; Corresponding authors at: School of Water Conservancy & Civil Engineering, Northeast Agricultural University, Changjiang Street No. 600, Harbin, 150030, PR China.School of Water Conservancy & Civil Engineering, Northeast Agricultural University, Harbin 150030, ChinaDue to the influence of snow cover and soil freeze–thaw processes in the early spring, the characteristics of spring drought in cold regions are different from those in other regions. This paper takes Qiqihar, a cold and semiarid grain production area in Northeast China, as the study area. Based on factors such as snow cover in the early spring period and precipitation, temperature, evapotranspiration, and soil moisture during the spring sowing period, a projection pursuit model with analysis of variance (ANOVA PPM) was used to analyze the spatiotemporal variation characteristics of regional spring drought. For the ANOVA PPM, based on the grouping of the projection points, local aggregation is measured by the mean square within groups, and overall dispersion is measured by the mean square between groups, thus achieving comparability and balance between overall dispersion and local aggregation. The spatial analysis of spring drought showed that, from a spatial perspective, there were significant spatial differences in spring drought in different subregions, and spring drought was closely related to latitude, with significant differences occurring at different latitudes. The northern region is relatively light, while the central and southern regions are more severe. From a temporal perspective, there are significant differences in spring droughts between different decades (1980 s, 1990 s, 2000 s and 2010 s). Overall, spring drought first intensifies and then decreases.http://www.sciencedirect.com/science/article/pii/S1470160X24002292Spring droughtCold and arid regionsAnalysis of varianceProjection pursuit model |
| spellingShingle | Wei Pei Lei Hao Qiang Fu Yongtai Ren Tianxiao Li Study on spring drought in cold and arid regions based on the ANOVA projection pursuit model Ecological Indicators Spring drought Cold and arid regions Analysis of variance Projection pursuit model |
| title | Study on spring drought in cold and arid regions based on the ANOVA projection pursuit model |
| title_full | Study on spring drought in cold and arid regions based on the ANOVA projection pursuit model |
| title_fullStr | Study on spring drought in cold and arid regions based on the ANOVA projection pursuit model |
| title_full_unstemmed | Study on spring drought in cold and arid regions based on the ANOVA projection pursuit model |
| title_short | Study on spring drought in cold and arid regions based on the ANOVA projection pursuit model |
| title_sort | study on spring drought in cold and arid regions based on the anova projection pursuit model |
| topic | Spring drought Cold and arid regions Analysis of variance Projection pursuit model |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X24002292 |
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