Article
Agronomy
Zhiyuan Zhang, Huanyuan Zhang, Zikun Cui, Feng Tao, Ziwei Chen, Yaxuan Chang, Vincenzo Magliulo, Georg Wohlfahrt, Dongsheng Zhao
Summary: The study found a positive correlation between respiration and temperature on a fine time scale, with variation in parameters across different biomes leading to varying Q(10) values. Additionally, there was no relationship found between mean annual temperature and mean annual respiration within sites, suggesting that small interannual variations in the sigmoid pattern can counteract the warming effect on respiration.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Agronomy
Xiuping Liu, Wenxu Dong, Jeffrey D. Wood, Yuying Wang, Xiaoxin Li, Yuming Zhang, Chunsheng Hu, Lianhong Gu
Summary: A three-way carbon dioxide flux-partitioning algorithm was developed and applied to a dataset of an oak-hickory deciduous broadleaf forest. The algorithm successfully separated net ecosystem exchange into aboveground plant respiration, belowground root and soil respiration, and gross primary production. It was found that belowground respiration dominated over aboveground respiration on an annual time scale, and the temperature sensitivity of belowground respiration was higher than that of aboveground respiration.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Multidisciplinary Sciences
Matthew Kaufman, Joshua Torgeson, James Stegen
Summary: We present a system for conducting small batch reactor oxygen consumption experiments on water and sediment samples, which offers advantages of multiple reactors operation, simultaneous measurement of oxygen concentrations, high throughput, and high time-resolution data. The system is designed to address the limitations in existing literature on similar studies and provide practical guidance for other researchers to construct and operate a similar system.
Article
Environmental Sciences
Luguang Jiang, Ye Liu, Haixia Xu
Summary: By analyzing remote sensing data and monitoring data from typical stations, we found that 1/3 of China's regions had significantly improved vegetation quality in the past 22 years, indicating continuous improvement in China's ecological situation. However, there were spatial heterogeneities in the trend of vegetation changes.
Article
Environmental Sciences
Zichong Chen, Junjie Liu, Daven K. Henze, Deborah N. Huntzinger, Kelley C. Wells, Stephen Sitch, Pierre Friedlingstein, Emilie Joetzjer, Vladislav Bastrikov, Daniel S. Goll, Vanessa Haverd, Atul K. Jain, Etsushi Kato, Sebastian Lienert, Danica L. Lombardozzi, Patrick C. McGuire, Joe R. Melton, Julia E. M. S. Nabel, Benjamin Poulter, Hanqin Tian, Andrew J. Wiltshire, Soenke Zaehle, Scot M. Miller
Summary: The study using OCO-2 satellite observations to explore global carbon cycle relationships shows limited ability to quantify relationships between atmospheric CO2 observations and environmental driver datasets. While precipitation is found to be associated with increased CO2 uptake in all tropical biomes, there is a large spread in relationships with key environmental driver datasets among terrestrial biosphere models.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Meteorology & Atmospheric Sciences
Cenlin He, Olivia Clifton, Emmi Felker-Quinn, S. Ryan Fulgham, Julieta F. Juncosa Calahorrano, Danica Lombardozzi, Gemma Purser, Mj Riches, Rebecca Schwantes, Wenfu Tang, Benjamin Poulter, Allison L. Steiner
Summary: Understanding the interactions between air pollution and terrestrial ecosystems is crucial for predicting the impacts on climate and human health. Coordinated measurements, data standardization, and collaboration across disciplines and regions are key for advancing this understanding.
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
(2021)
Article
Geosciences, Multidisciplinary
Alireza Farahmand, J. T. Reager, Nima Madani
Summary: The paragraph discusses the complexity of droughts and their slow evolution over time due to interactions between the atmosphere and the land surface. It emphasizes the use of satellite observations and reanalysis data to quantify cascade phenomena in major US drought case studies, aiming to enhance future predictability of drought events.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Agronomy
Haoran Gui, Jiali Wang, Mengjun Hu, Zhenxing Zhou, Shiqiang Wan
Summary: The effects of fire on soil respiration (SR) and heterotrophic respiration (HR) depend on fire severity and type. High and low severity fires reduce SR and HR, while moderate severity fires have negligible effects. Wildfires significantly decrease SR and HR, while prescribed fire decreases SR but does not affect HR. The responses also vary with ecosystem types. Additionally, the changes in soil organic C, dissolved C, microbial biomass C, and belowground biomass are the main drivers of the effects of fire on SR and HR.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Review
Environmental Sciences
Wanyuan Cai, Sana Ullah, Lei Yan, Yi Lin
Summary: This paper reviews the progress in estimating WUE by remote sensing through direct and indirect methods, with indirect methods mainly based on ground observation of GPP/ET, processed models, and remote sensing.
Article
Environmental Sciences
Rui Tang, Bin He, Hans W. Chen, Deliang Chen, Yaning Chen, Yongshuo H. Fu, Wenping Yuan, Baofu Li, Zhi Li, Lanlan Guo, Xingming Hao, Liying Sun, Huiming Liu, Cheng Sun, Yang Yang
Summary: Despite overall warming, many regions in the Northern Hemisphere have been cooling in autumn. This cooling has led to an increase in the release of net CO2, as primary production decreased more than respiration in cooling areas and respiration increased more than production in warming areas. Despite opposite temperature trends, there has been a systematic increase in ecosystem carbon release across the Northern Hemisphere middle and high latitudes.
NATURE CLIMATE CHANGE
(2022)
Review
Chemistry, Analytical
Pavel Vyvlecka, Vilem Pechanec
Summary: Keeping natural ecosystems and their functions in proper condition is essential, and remote sensing, especially optical remote sensing, is an effective contactless monitoring method for vegetation applications. This article provides an overview of remote sensing methods for monitoring ecosystem functions, with a focus on aboveground-biomass production and storage. The study summarizes related research and highlights the importance of factors such as satellite imagery, spatial resolution, spectral bands, algorithm selection, and validation data in accurately quantifying ecosystem functions.
Article
Environmental Sciences
A. A. Renchon, J. E. Drake, C. A. Macdonald, D. Sihi, N. Hinko-Najera, M. G. Tjoelker, S. K. Arndt, N. J. Noh, E. Davidson, E. Pendall
Summary: Understanding the seasonal and diurnal dynamics of ecosystem respiration in forests is challenging due to the limitations in direct measurement methods. While soil respiration plays a significant role in seasonal variation, above-ground respiration may have a greater impact on the diurnal variation of ecosystem respiration. To improve the accuracy of ecosystem respiration measurements, it is essential to consider both above-ground and soil respiration processes.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Agronomy
Mika Korkiakoski, Paavo Ojanen, Juha-Pekka Tuovinen, Kari Minkkinen, Olli Nevalainen, Timo Penttila, Mika Aurela, Tuomas Laurila, Annalea Lohila
Summary: The wide-spread harvesting of forests on drained peatlands in Finland has raised concerns about its impact on carbon dioxide emissions and climate change. A study conducted in a mature peatland forest in southern Finland compared the impact of clear-cutting and partial cutting on CO2 exchange. The results showed that partial cutting resulted in significantly lower CO2 emissions in the short term, while clear-cutting continued to be a significant source of CO2 emissions throughout the measurement period. It was also found that the forest floor lost carbon both before and after the cuttings.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Review
Geography, Physical
Jose A. Caparros-Santiago, Victor Rodriguez-Galiano, Jadunandan Dash
Summary: Vegetation phenology serves as a key biological indicator for understanding ecosystem behavior and responses to environmental cues. Research shows a general trend of spring advancing and autumn delaying, although challenges arise from the complex interactions between various climatic and non-climatic factors, making phenology modeling a difficult task.
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
(2021)
Article
Multidisciplinary Sciences
Katharyn A. Duffy, Christopher R. Schwalm, Vickery L. Arcus, George W. Koch, Liyin L. Liang, Louis A. Schipper
Summary: The temperature dependence of global photosynthesis and respiration influences the strength of land carbon sink, with the average temperature of the warmest quarter exceeding the thermal maximum for photosynthesis over the past decade, leading to a potential halving of land sink strength in the future.
Article
Biodiversity Conservation
Tao Bao, Gensuo Jia, Xiyan Xu
Summary: This study investigates the response of wetland plants to climate warming. The results show that warming leads to increased biomass accumulation for vascular plants and decreased biomass accumulation for cryptogams. This divergent response is particularly pronounced in high latitudes with permafrost. The reduction in cryptogams is more drastic, leading to a shift in wetland composition and increased dominance of vascular plants. Under a high-emission scenario, a global temperature rise of 4.7-5.1 degrees C will cause a significant loss of cryptogams, especially in northern high latitudes.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Eghosa Igun, Xiyan Xu, Yonghong Hu, Gensuo Jia
Summary: 2019 was one of the hottest years in recent decades, particularly for Africa. Heatwaves were widespread across the continent, with hotspots identified in western-coastal, northeastern, southern, and equatorial Africa where major cities and human populations are located. The proportion of urban populations exposed to extreme heatwaves increased significantly compared to previous years, indicating a higher risk for populated areas in Africa.
ATMOSPHERIC AND OCEANIC SCIENCE LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Huichen Zhao, Xiyan Xu, Gensuo Jia, Anzhi Zhang, Hesong Wang
Summary: This study evaluated the impact of extreme precipitation events on carbon exchange in arid, semi-arid, and sub-humid ecosystems under different water conditions. It was found that antecedent water conditions determined the asynchronous response of ecosystem respiration and GPP to EPEs, affecting the net carbon balance.
THEORETICAL AND APPLIED CLIMATOLOGY
(2022)
Article
Environmental Sciences
Huichen Zhao, Gensuo Jia, Xiyan Xu, Anzhi Zhang
Summary: Increases in rainfall variability due to climate change affect gross primary production (GPP) in drylands, but it is unclear how GPP responds to different wet and dry anomalies. This study found that wet anomalies caused significant increases in GPP in the arid region of Northeast China Transect (NECT), with the magnitude of increase decreasing towards the humid region. Dry anomalies reduced GPP in all ecosystems except for mesic forest. The responses of GPP to wet and dry anomalies resulted in contrasting asymmetries in different biomes.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Environmental Sciences
Yue Liang, Xiyan Xu, Gensuo Jia
Summary: The study reveals that large-scale deforestation has significant impacts on the global monsoon system, leading to reduced precipitation in both the global monsoon regions and the land monsoon regions. The precipitation reduction is particularly pronounced in the Northern Hemisphere Summer Monsoon regions. Deforestation also causes asymmetrical temperature response, weakening the circulation intensity and leading to decreased monsoon circulation and precipitation intensity.
Article
Environmental Sciences
Eghosa Igun, Xiyan Xu, Zitong Shi, Gensuo Jia
Summary: Despite being relatively understudied, nighttime heatwaves in Africa, especially in rapidly expanding urban areas, have dramatically increased during 1981-2020 due to urbanization and large scale circulation induced dry conditions. The strongest contribution of urbanization to nighttime heatwaves was observed in temperate climate, while in arid climate, urban expansion had a negative impact on nighttime heatwaves. Without appropriate adaptation efforts, the risks posed by heatwaves in Africa's urban areas will continue to increase under future warming.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Biology
Yuanhu Shao, Zuyan Wang, Tao Liu, Paul Kardol, Chengen Ma, Yonghong Hu, Yang Cui, Cancan Zhao, Weixin Zhang, Dali Guo, Shenglei Fu
Summary: In this study, nematode diversity in forest soils was found to be mainly influenced by soil organic carbon content, but climatic factors such as temperature, soil phosphorus content, soil pH, and precipitation also played significant roles. Furthermore, there were differences in nematode diversity between different climatic zones. Therefore, high-resolution studies are necessary to accurately predict the response of soil functions when climate conditions exceed the coping range of soil organisms.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Environmental Sciences
Tao Bao, Gensuo Jia, Xiyan Xu
Summary: Pristine wetlands have the potential to mitigate climate change, but their role as a greenhouse gas sink or source under warming is uncertain. Observations from 167 sites reveal that wetlands' global warming potential increased by 57% due to a temperature increase of 1.5-2.0 degrees C. The differences in dominant plant types contribute to emission uncertainties. Warming reduces the greenhouse gas sink of pristine wetlands, especially in permafrost areas dominated by vascular plants.
NATURE CLIMATE CHANGE
(2023)
Article
Environmental Sciences
Ning Wang, Yonghong Hu, Xiao Ming Li, Chuanli Kang, Lin Yan
Summary: This study used high-resolution low light images from the GLI instrument on board the SDGSAT-1 satellite to investigate the spatial-temporal changes in night light emitted from the urban surface of Beijing. The results showed good consistencies between the derived aerosol optical depth (AOD) from remote sensing and nighttime site observations. The radiance background method (RB) was found to be better than the standard deviation method (SD) for deriving AOD using the SDGSAT-1/GLI with a lower root mean square error (RMSE) of 0.0984 compared to 0.7653 for SD. This study demonstrates that SDGSAT-1 can provide relatively reliable night AOD values and has the potential to deliver scientific products of nighttime AOD.
Article
Environmental Sciences
Zhenzhen Cui, Chao Ma, Hao Zhang, Yonghong Hu, Lin Yan, Changyong Dou, Xiao-Ming Li
Summary: The Sustainable Development Science Satellite 1 (SDGSAT-1) carries a multispectral imager (MII) that is used for detailed terrestrial change detection and coastal monitoring. A vicarious radiometric calibration experiment was conducted to calibrate the MII using different methods and measurements. The calibrated MII images were compared with Landsat-8 Operational Land Imager (OLI) and Sentinel-2A MultiSpectral Instrument (MSI) images, and the differences were within acceptable limits. The findings support the application of SDGSAT-1 data.
Article
Biodiversity Conservation
Tingting Xu, Anzhi Zhang, Xiyan Xu, Gensuo Jia
Summary: Temperate deciduous broadleaf forests are crucial in providing ecosystem services and mitigating climate change. However, the response of carbon sink in these forests to recent warming slowdown is not well understood. This study found that the carbon sink of temperate deciduous broadleaf forests decreased during the warming slowdown period, and temperature and water availability played important roles in controlling carbon sink changes.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Zacharia Florence Mtewele, Gensuo Jia, Xiyan Xu
Summary: This study quantifies the water availability and vegetation changes during extreme climate events in the Serengeti-Masai Mara Ecosystem (SMME) and analyzes the impact of these changes on animal populations and migration prospects. The study reveals that extreme events such as droughts and floods pose threats to the ecosystem and affect animal migration behavior.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Geography, Physical
Yonghong Hu, Xiao-Ming Li, Changyong Dou, Gensuo Jia, Zhuoyue Hu, Anlun Xu, Yongzheng Ren, Lin Yan, Ning Wang, Zhenzhen Cui, Fansheng Chen
Summary: A thermal infrared spectrometer is a crucial sensor on SDGSAT-1 for sustainable development. Field campaigns were conducted to evaluate radiometric calibrations by deriving spectral radiance of lake surface. Results showed varying calibration accuracy among different bands, with band 3 having the best accuracy. Atmospheric conditions and surface characterization affect the calibration accuracy. Regular field experiments are necessary to monitor and improve calibration, creating high-resolution and reasonable datasets.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Environmental Sciences
Huichen Zhao, Gensuo Jia, Xiyan Xu, Anzhi Zhang, Hesong Wang
Summary: Intensified precipitation can increase or decrease GPP in dry or normal years, respectively, but this effect is largely weakened in wet years. Land cover types and soil texture regulate the magnitude of these effects on GPP.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
