Varying Responses of Vegetation Greenness to the Diurnal Warming across the Global
The distribution of global warming has been varying both diurnally and seasonally. Little is known about the spatiotemporal variations in the relationships between vegetation greenness and day- and night-time warming during the last decades. We investigated the global inter- and intra-annual respons...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Plants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2223-7747/11/19/2648 |
| _version_ | 1797477375238209536 |
|---|---|
| author | Jie Zhao Kunlun Xiang Zhitao Wu Ziqiang Du |
| author_facet | Jie Zhao Kunlun Xiang Zhitao Wu Ziqiang Du |
| author_sort | Jie Zhao |
| collection | DOAJ |
| description | The distribution of global warming has been varying both diurnally and seasonally. Little is known about the spatiotemporal variations in the relationships between vegetation greenness and day- and night-time warming during the last decades. We investigated the global inter- and intra-annual responses of vegetation greenness to the diurnal asymmetric warming during the period of 1982–2015, using the normalized different vegetation index (NDVI, a robust proxy for vegetation greenness) obtained from the NOAA/AVHRR NDVI GIMMS3g dataset and the monthly average daily maximum (T<sub>max</sub>) and minimum temperature (T<sub>min</sub>) obtained from the gridded Climate Research Unit, University of East Anglia. Several findings were obtained: (1) The strength of the relationship between vegetation greenness and the diurnal temperature varied on inter-annual and seasonal timescales, indicating generally weakening warming effects on the vegetation activity across the global. (2) The decline in vegetation response to T<sub>max</sub> occurred mainly in the mid-latitudes of the world and in the high latitudes of the northern hemisphere, whereas the decline in the vegetation response to T<sub>min</sub> primarily concentrated in low latitudes. The percentage of areas with a significantly negative trend in the partial correlation coefficient between vegetation greenness and diurnal temperature was greater than that of the areas showing the significant positive trend. (3) The trends in the correlation between vegetation greenness and diurnal warming showed a complex spatial pattern: the majority of the study areas had undergone a significant declining strength in the vegetation greenness response to T<sub>max</sub> in all seasons and to T<sub>min</sub> in seasons except autumn. These findings are expected to have important implications for studying the diurnal asymmetry warming and its effect on the terrestrial ecosystem. |
| first_indexed | 2024-03-09T21:16:44Z |
| format | Article |
| id | doaj.art-35bd1b1e58fe427bb48f40e837133c7e |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-09T21:16:44Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-35bd1b1e58fe427bb48f40e837133c7e2023-11-23T21:30:58ZengMDPI AGPlants2223-77472022-10-011119264810.3390/plants11192648Varying Responses of Vegetation Greenness to the Diurnal Warming across the GlobalJie Zhao0Kunlun Xiang1Zhitao Wu2Ziqiang Du3Institute of Loess Plateau, Shanxi University, Taiyuan 030006, ChinaGuangdong Ecological Meteorology Center, Guangzhou 510275, ChinaInstitute of Loess Plateau, Shanxi University, Taiyuan 030006, ChinaInstitute of Loess Plateau, Shanxi University, Taiyuan 030006, ChinaThe distribution of global warming has been varying both diurnally and seasonally. Little is known about the spatiotemporal variations in the relationships between vegetation greenness and day- and night-time warming during the last decades. We investigated the global inter- and intra-annual responses of vegetation greenness to the diurnal asymmetric warming during the period of 1982–2015, using the normalized different vegetation index (NDVI, a robust proxy for vegetation greenness) obtained from the NOAA/AVHRR NDVI GIMMS3g dataset and the monthly average daily maximum (T<sub>max</sub>) and minimum temperature (T<sub>min</sub>) obtained from the gridded Climate Research Unit, University of East Anglia. Several findings were obtained: (1) The strength of the relationship between vegetation greenness and the diurnal temperature varied on inter-annual and seasonal timescales, indicating generally weakening warming effects on the vegetation activity across the global. (2) The decline in vegetation response to T<sub>max</sub> occurred mainly in the mid-latitudes of the world and in the high latitudes of the northern hemisphere, whereas the decline in the vegetation response to T<sub>min</sub> primarily concentrated in low latitudes. The percentage of areas with a significantly negative trend in the partial correlation coefficient between vegetation greenness and diurnal temperature was greater than that of the areas showing the significant positive trend. (3) The trends in the correlation between vegetation greenness and diurnal warming showed a complex spatial pattern: the majority of the study areas had undergone a significant declining strength in the vegetation greenness response to T<sub>max</sub> in all seasons and to T<sub>min</sub> in seasons except autumn. These findings are expected to have important implications for studying the diurnal asymmetry warming and its effect on the terrestrial ecosystem.https://www.mdpi.com/2223-7747/11/19/2648varying responsediurnal warmingvegetation activityNDVI |
| spellingShingle | Jie Zhao Kunlun Xiang Zhitao Wu Ziqiang Du Varying Responses of Vegetation Greenness to the Diurnal Warming across the Global Plants varying response diurnal warming vegetation activity NDVI |
| title | Varying Responses of Vegetation Greenness to the Diurnal Warming across the Global |
| title_full | Varying Responses of Vegetation Greenness to the Diurnal Warming across the Global |
| title_fullStr | Varying Responses of Vegetation Greenness to the Diurnal Warming across the Global |
| title_full_unstemmed | Varying Responses of Vegetation Greenness to the Diurnal Warming across the Global |
| title_short | Varying Responses of Vegetation Greenness to the Diurnal Warming across the Global |
| title_sort | varying responses of vegetation greenness to the diurnal warming across the global |
| topic | varying response diurnal warming vegetation activity NDVI |
| url | https://www.mdpi.com/2223-7747/11/19/2648 |
| work_keys_str_mv | AT jiezhao varyingresponsesofvegetationgreennesstothediurnalwarmingacrosstheglobal AT kunlunxiang varyingresponsesofvegetationgreennesstothediurnalwarmingacrosstheglobal AT zhitaowu varyingresponsesofvegetationgreennesstothediurnalwarmingacrosstheglobal AT ziqiangdu varyingresponsesofvegetationgreennesstothediurnalwarmingacrosstheglobal |