Eddy covariance measurements reveal a decreased carbon sequestration strength 2010–2022 in an African semiarid savanna DOI Creative Commons
Aleksander Więckowski,

Patrik Vestin,

Jonas Ardö

и другие.

Global Change Biology, Год журнала: 2024, Номер 30(9)

Опубликована: Сен. 1, 2024

Abstract Monitoring the changes of ecosystem functioning is pivotal for understanding global carbon cycle. Despite its size and contribution to cycle, Africa largely understudied in regard ongoing their responses climate change. One reasons lack long‐term situ data. Here, we use eddy covariance quantify net exchange (NEE) components—gross primary production (GPP) respiration ( R eco ) years 2010–2022 a Sahelian semiarid savanna study trends fluxes. Significant negative were found NEE (12.7 ± 2.8 g C m 2 year −1 ), GPP (39.6 7.9 (32.2 8.9 ). We that decreased by 60% over period, this decrease was mainly caused stronger rainy season than . Additionally, observed strong increasing vapor pressure deficit, but no rainfall or soil water content. Thus, proposed explanation sink strength atmospheric dryness. The warming Sahel, coupled with evaporative demand, may thus lead levels across biome, lowering CO sequestration.

Язык: Английский

Carbon dioxide fluxes and carbon budget of a sugarcane ecosystem with crop residue returning in South China DOI

Zhuoting Li,

Qiangsheng Xu,

Wenting Ning

и другие.

Field Crops Research, Год журнала: 2025, Номер 322, С. 109744 - 109744

Опубликована: Янв. 9, 2025

Язык: Английский

Процитировано

0
Refining snow-streamflow dynamics in a Tibetan Plateau basin by incorporating snow depth and topography DOI
Lei Tian,

Wenjie Wang,

Xiaogang Ma

и другие.

Journal of Hydrology, Год журнала: 2025, Номер unknown, С. 133057 - 133057

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0
Influence of Groundwater Depth on Salt Migration and Maize Growth in the Typical Irrigation Area DOI Creative Commons

Liping Dai,

Qingfeng Miao, Haibin Shi

и другие.

Agronomy, Год журнала: 2025, Номер 15(5), С. 1021 - 1021

Опубликована: Апрель 24, 2025

Groundwater depth has a significant impact on salinization in irrigated areas. In this study, different groundwater depths were controlled via pit tests and we conducted with (DGWs) to investigate the relationship between irrigation water volume salt migration during crop growth period, as well influence of DGW maize yield. The aim study was determine an appropriate for Hetao Irrigation District, largest area Asia, under dual goals conservation control. results showed that upward replenishment 179.60 mm, 139.17 119.98 68.62 48.38 mm each respective DGW, i.e., negatively correlated period. Soil electrical conductivity (EC) exponentially related DGW. For DGWs > 1.75 m, surface soil EC decreased significantly exhibited less variation Moreover, desalination rate after improved at values 2.00 m 2.25 m. Shallow resulted increased evapotranspiration intensified stress, which reduced use efficiency. To reduce resource waste stress crops, suggest 2.00~2.25 is more suitable development. These provide reference determining salinized

Язык: Английский

Процитировано

0
Stable isotopes reveal soil evaporation and its controlling factors in the Heihe River source area on the northeastern Qinghai-Tibetan Plateau DOI Creative Commons
Fang Liu, Xiaoyan Li, Fangzhong Shi

и другие.

Journal of Hydrology Regional Studies, Год журнала: 2024, Номер 54, С. 101901 - 101901

Опубликована: Июль 29, 2024

The Heihe River source area in the Northeastern Qinghai-Tibetan Plateau, China. Soil evaporation, which is a key process soil water loss, influenced by various environmental factors. However, identification of its main drivers on large scale alpine mountains remains challenging due to sampling constraints. This study examined spatial distribution evaporation and control factors during growing season area. results indicated that represented lc-excess values, gradually increased from southeast northwest, then decreased, reaching depth 50 cm below surface. Although normalized difference vegetation index explained 54 % variation interaction between land surface temperature content (SWC) provided more robust explanation. losses exhibited following pattern: cropland > grassland forest shrubland. In shrubland, SWC precipitation 68 73.3 variations respectively. Grassland mainly relied SWC, with 49.33 unexplained variability Meanwhile, aridity aspect 45 44.6 cropland. These findings invaluable information for advancing our understanding ecohydrological processes mountains.

Язык: Английский

Процитировано

2
Eddy covariance measurements reveal a decreased carbon sequestration strength 2010–2022 in an African semiarid savanna DOI Creative Commons
Aleksander Więckowski,

Patrik Vestin,

Jonas Ardö

и другие.

Global Change Biology, Год журнала: 2024, Номер 30(9)

Опубликована: Сен. 1, 2024

Abstract Monitoring the changes of ecosystem functioning is pivotal for understanding global carbon cycle. Despite its size and contribution to cycle, Africa largely understudied in regard ongoing their responses climate change. One reasons lack long‐term situ data. Here, we use eddy covariance quantify net exchange (NEE) components—gross primary production (GPP) respiration ( R eco ) years 2010–2022 a Sahelian semiarid savanna study trends fluxes. Significant negative were found NEE (12.7 ± 2.8 g C m 2 year −1 ), GPP (39.6 7.9 (32.2 8.9 ). We that decreased by 60% over period, this decrease was mainly caused stronger rainy season than . Additionally, observed strong increasing vapor pressure deficit, but no rainfall or soil water content. Thus, proposed explanation sink strength atmospheric dryness. The warming Sahel, coupled with evaporative demand, may thus lead levels across biome, lowering CO sequestration.

Язык: Английский

Процитировано

2