Article
Forestry
Maricar Aguilos, Ian Warr, Madison Irving, Olivia Gregg, Stanton Grady, Toby Peele, Asko Noormets, Ge Sun, Ning Liu, Steve McNulty, Forrest Pettay, Shamik Bhattacharya, Skylar Penney, Maccoy Kerrigan, Linqing Yang, Bhaskar Mitra, Prajaya Prajapati, Kevan Minick, John King
Summary: Coastal wetlands are important ecosystems that store a large amount of carbon and have high productivity. However, they are threatened by various natural and human disturbances. By studying a coastal forested wetland, we found that climate and hydrologic factors play a significant role in carbon fluxes and balance. Air temperature, net radiation, and groundwater table depth have a strong impact on gross primary productivity, ecosystem respiration, and net ecosystem carbon exchange.
Article
Agronomy
Muqier Hasi, Xueyao Zhang, Guoxiang Niu, Yinliu Wang, Qianqian Geng, Quan Quan, Shiping Chen, Xingguo Han, Jianhui Huang
Summary: In the semiarid steppe of Erguna, Inner Mongolia, increasing nitrogen input can significantly enhance ecosystem C exchange, but only when soil moisture exceeds a certain threshold. In addition to considering the interactions of water, temperature, and nitrogen, their synergistic effects also need to be taken into account. During the growing seasons, the number of days with soil moisture content higher than 15% accounted for only about one third.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Agronomy
Zewei Yue, Zhao Li, Guirui Yu, Zhi Chen, Peili Shi, Yunfeng Qiao, Kun Du, Chao Tian, Fenghua Zhao, Peifang Leng, Zhaoxin Li, Hefa Cheng, Gang Chen, Fadong Li
Summary: This study characterized the CO2 fluxes of a winter wheat-summer maize rotation cropland in different growing periods and identified the driving factors using long-term monitoring data. Leaf area index (LAI), photosynthetically active radiation (PAR), and soil water content (SWC) were found to be important drivers of CO2 fluxes in both wheat and maize seasons. The findings provide valuable insights into the carbon cycle of cropland ecosystems under climate change.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Environmental Sciences
Yayi Niu, Yuqiang Li, Mingming Wang, Xuyang Wang, Yun Chen, Yulong Duan
Summary: Sandy cropland ecosystems in the semi-arid region of Horqin Sandy Land are crucial for the regional carbon balance. Continuous CO2 flux observation from 2014 to 2018 revealed that the sandy cropland acted as a carbon sink, but became a net carbon source after accounting for carbon exports and imports. The carbon fluxes were greatly influenced by environmental factors at different temporal scales, with water availability playing a dominant role in explaining inter-annual variability of gross primary productivity and ecosystem respiration.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Agronomy
D. Menefee, Russell L. Scott, M. Abraha, J. G. Alfieri, J. Baker, Dawn M. Browning, Jiquan Chen, Jeff Gonet, J. M. F. Johnson, G. R. Miller, Rachel Nifong, Phil Robertson, E. S. Russell, N. Saliendra, Adam P. Schreiner-Mcgraw, A. Suyker, P. Wagle, Chris Wente, P. M. White, Doug Smith
Summary: Research from the Long-Term Agroecosystem Research (LTAR) network shows that different crop types and management practices have varying effects on carbon fluxes, with precipitation having a significant impact on rainfed crops. Utilizing eddy covariance measurements can further carbon flux research.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Plant Sciences
Xiaotao Huang, Chunbo Chen, Buqing Yao, Zhen Ma, Huakun Zhou
Summary: This study estimated the carbon budget and response to grazing in Qinghai grasslands using a model, revealing spatiotemporal dynamics and regional differences. The results contribute to understanding the mechanism driving variation in grassland carbon budget and provide valuable data for local grassland management.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Ecology
Ritika Srinet, Subrata Nandy, N. R. Patel, Hitendra Padalia, Taibanganba Watham, Sanjeev K. Singh, Prakash Chauhan
Summary: This study simulated forest carbon fluxes in two major plant functional types in the northwest Himalayan foothills of India using remote sensing data and Biome-BGC model. The study found that integrating remote sensing data into the calibrated process-based model increased the accuracy of model-simulated forest carbon fluxes.
ECOLOGICAL MODELLING
(2023)
Article
Agronomy
Shrijana Vaidya, Marten Schmidt, Peter Rakowski, Norbert Bonk, Gernot Verch, Juergen Augustin, Michael Sommer, Mathias Hoffmann
Summary: Accurate assessment of CO2 exchange is crucial in identifying C sources and sinks, with current methods often failing to account for the impact of management and soil in cropland areas. Widely used measurement techniques are limited in their ability to capture both short-term temporal variability and small-scale spatial heterogeneity simultaneously.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Environmental Sciences
Sung-Ching Lee, Sara H. Knox, Ian McKendry, T. Andrew Black
Summary: In Canada, it is expected that area burned, number of fires, seasonal fire severity, and fire season length will increase. However, the ecosystem feedbacks to these changes are still largely unknown. This study conducted measurements in forest and wetland ecosystems during four smoke episodes to assess the impacts on gross primary production (GPP). The results revealed that smoke affected shortwave irradiance, heat fluxes, and carbon dioxide (CO2) exchanges, with varying responses depending on the timing and density of the smoke.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Environmental Studies
Amit Kumar, Arti Bhatia, Vinay Kumar Sehgal, Ritu Tomer, Niveta Jain, Himanshu Pathak
Summary: In a rice-wheat cropping system in the north-western Indo-Gangetic Plains, rice grown under anaerobic conditions followed by spring wheat under aerobic conditions showed that wheat had a higher CO2 uptake rate compared to rice. The net ecosystem exchange (NEE) was also different between the two crops, with wheat having a lower net uptake of CO2.
Article
Environmental Sciences
Hui Guo, Sien Li, Fuk-Ling Wong, Shujing Qin, Yahui Wang, Danni Yang, Hon-Ming Lam
Summary: This study investigates the effects of drip irrigation on carbon flux in arid regions of northwestern China from 2014 to 2018. Results show that the carbon flux in maize fields exhibited seasonal patterns, with leaf area index being the main driver of seasonal variation. The study also found that the drip-irrigated maize field acted as a carbon source after harvest, influenced by environmental and vegetation factors.
CARBON BALANCE AND MANAGEMENT
(2021)
Article
Geosciences, Multidisciplinary
Zhaoyang Zhang, Meng Fan, Minghui Tao, Yunhui Tan, Quan Wang
Summary: Four remote sensing data-driven (RS) models were evaluated in simulating the effect of diffuse radiation on water-use efficiency (WUE). There was a large divergence among RS models in estimating the response of WUE to fraction of diffuse PAR (FDP). PML model performed better than other RS models in simulating the diffuse radiation effect on WUE.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Qiaoyan Li, Albert Tietema, Sabine Reinsch, Inger Kappel Schmidt, Giovanbattista de Dato, Gabriele Guidolotti, Eszter Lellei-Kovacs, Gillian Kopittke, Klaus Steenberg Larsen
Summary: Shrubland ecosystems in Europe are under threat from climate change. The INCREASE project conducted experiments on six shrubland ecosystems across Europe to investigate the effects of nighttime warming and drought on CO2 fluxes. The study found that gross primary productivity (GPP) was more sensitive to drought and warming than ecosystem respiration (Reco), and GPP was the main contributor to changes in net ecosystem exchange (NEE). The response of NEE to drought and warming varied along the climate gradient, with northern sites showing a neutral to positive response due to seasonal rewetting. The study also highlighted the importance of site-specific factors, such as growing season periods and plant species composition, in influencing the overall response pattern of CO2 fluxes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Ecology
Nathalie Pettorelli, Henrike Schulte To Buhne
Summary: Rewilding is suggested as a strategy for environmental challenges, but monitoring the projects lacks information. This article discusses the use of satellite remote sensing in rewilding science, including understanding the role of animals in ecosystem functioning, improving landscape-scale connectivity monitoring, and assessing the impacts of rewilding on conservation status. Despite barriers, integrating satellite remote sensing requires interdisciplinary collaboration and conceptual shifts in biodiversity conservation communities and organizations.
REMOTE SENSING IN ECOLOGY AND CONSERVATION
(2023)
Article
Environmental Sciences
Hanlin Niu, Xiao-Ming Hu, Lunyu Shang, Xianhong Meng, Shaoying Wang, Zhaoguo Li, Lin Zhao, Hao Chen, Mingshan Deng, Danrui Sheng
Summary: This study evaluates the improvement of terrestrial flux parameterization in the WRF-VPRM model in reproducing carbon flux observations over the Tibetan Plateau. The improved model considers the impact of water stress on terrestrial fluxes and shows better performance in reducing bias and error in carbon flux estimation. The study also reveals the influence of eastward winds on the transport of lower CO2 concentrations and its effect on biospheric CO2 uptake.
Article
Engineering, Electrical & Electronic
Andreas Colliander, Rolf Reichle, Wade Crow, Michael Cosh, Fan Chen, Steven Chan, Narendra Narayan Das, Rajat Bindlish, J. Chaubell, Seungbum Kim, Qing Liu, Peggy OaNeill, Scott Dunbar, Land Dang, John S. Kimball, Thomas Jackson, Hala Al-Jassar, Jun Asanuma, Bimal Bhattacharya, Aaron Berg, David Bosch, Laura Bourgeau-Chavez, Todd Caldwell, Jean-Christophe Calvet, Chandra Collins, Karsten Jensen, Stan Livingston, Ernesto Lopez-Baeza, Jose Martinez-Fernandez, Heather McNairn, Mahta Moghaddam, Carsten Montzka, Claudia Notarnicola, Thierry Pellarin, Isabella Greimeister-Pfeil, Jouni Pulliainen, Judith Ramos, Judith Gpe. Ramos Hernandez, Mark Seyfried, Patrick Starks, Bob Su, R. van der Velde, Yijian Zeng, Marc Thibeault, Mariette Vreugdenhil, Jeffrey Walker, Mehrez Zribi, Dara Entekhabi, Simon Yueh
Summary: The National Aeronautics and Space Administration's Soil Moisture Active Passive (SMAP) mission has been validating its soil moisture products since 2015. The results show that the SMAP products meet the mission requirements and are generally consistent with other satellite products. The validation program will continue and plans to expand to forested and high-latitude regions.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2022)
Article
Meteorology & Atmospheric Sciences
K. Arthur Endsley, John S. Kimball, Rolf H. Reichle
Summary: In the northern hemisphere, terrestrial ecosystems transition from CO2 sources in winter to carbon sinks in spring. A phase bias in seasonal cycles of ecosystem respiration (RECO) and net ecosystem exchange (NEE) estimated by a carbon flux model framework is diagnosed, and its link to soil respiration mechanisms is investigated. Proposed modifications to the model include the inhibition of foliar respiration in the light, a seasonally varying litterfall phenology, an O-2 diffusion limitation on heterotrophic respiration, and a vertically resolved soil decomposition model. Applying these enhancements improves the skill of RECO and NEE estimations compared to in situ observations.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Meteorology & Atmospheric Sciences
S. Apers, G. J. M. De Lannoy, A. J. Baird, A. R. Cobb, G. C. Dargie, J. Pasquel, A. Gruber, A. Hastie, H. Hidayat, T. Hirano, A. M. Hoyt, A. J. Jovani-Sancho, A. Katimon, A. Kurnain, R. D. Koster, M. Lampela, S. P. P. Mahanama, L. Melling, S. E. Page, R. H. Reichle, M. Taufik, J. Vanderborght, M. Bechtold
Summary: Tropical peatlands are carbon-dense ecosystems and their water storage dynamics have a significant impact on carbon stocks. This study integrated hydrology modules specific to tropical peatlands into a global land surface model. The performance of the model was evaluated using in situ water level and evapotranspiration data, showing overall improvements compared to the default model. However, there were regional differences in performance, likely due to variations in meteorological data accuracy and unaccounted-for peatland hydrologic response.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Geosciences, Multidisciplinary
Eunjee Lee, Randal D. Koster, Lesley E. Ott, Joanna Joiner, Fan-Wei Zeng, Jana Kolassa, Rolf H. Reichle, Kristi R. Arsenault, Abheera Hazra, Shraddhanand Shukla
Summary: This study demonstrates the potential of a state-of-the-art S2S forecast system in accurately predicting Gross Primary Production (GPP) over multiple months. Results show significant skill in forecasting GPP from spring to summer in mid- and high latitudes of the Northern Hemisphere, although skill levels vary spatially across different regions.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Zhen Zhang, Abhishek Chatterjee, Lesley Ott, Rolf Reichle, Andrew F. Feldman, Benjamin Poulter
Summary: Soil moisture plays a crucial role in the carbon-water coupling process in terrestrial ecosystems. Utilizing soil moisture data from the SMAP satellite mission can improve model simulations of carbon fluxes and enhance predictions under extreme events.
Article
Environmental Sciences
Wade T. Crow, Jianzhi Dong, Rolf H. Reichle
Summary: This study demonstrates the importance of the rank correlation between surface soil moisture and storm-scale runoff in calibrating streamflow estimates in ungauged basins. A new calibration approach based on L4_SM has been successfully developed to identify LSM configurations with high rank correlation with observed runoff coefficients.
WATER RESOURCES RESEARCH
(2022)
Editorial Material
Environmental Sciences
Andrew F. F. Feldman, Daniel J. Short J. Gianotti, Jianzhi Dong, Ruzbeh Akbar, Wade T. T. Crow, Kaighin A. A. McColl, Alexandra G. G. Konings, Jesse B. B. Nippert, Shersingh Joseph Tumber-Davila, Noel M. M. Holbrook, Fulton E. E. Rockwell, Russell L. L. Scott, Rolf H. H. Reichle, Abhishek Chatterjee, Joanna Joiner, Benjamin Poulter, Dara Entekhabi
Summary: A commonly expressed viewpoint is that satellite L-band measurements of global soil moisture only represent surface moisture and thus have limited value for studying global terrestrial ecosystems. However, based on peer-reviewed literature, this viewpoint is overly limiting. Microwave soil emission depth considerations and isotopic tracer field studies suggest that L-band measurements provide information about soil moisture beyond the commonly referenced 5 cm. Additionally, most vegetation, including grasslands and croplands, primarily draw moisture from the upper soil layers, making L-band satellite soil moisture estimates relevant for global vegetation water uptake.
WATER RESOURCES RESEARCH
(2023)
Article
Meteorology & Atmospheric Sciences
Rolf H. Reichle, Sara Q. Q. Zhang, Jana Kolassa, Qing Liu, Ricardo Todling
Summary: The NASA Goddard Earth Observing System (GEOS) uses a Hybrid-4DEnVar system to provide real-time weather analysis and forecast products. This study introduces a land analysis into the GEOS Hybrid-4DEnVar system to assimilate L-band brightness temperature observations over land, which helps improve the forecast accuracy of specific humidity and temperature. The assimilation of these observations has shown significant improvements in forecast accuracy and anomaly correlation at lead times up to 5 days.
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Randal D. Koster, Qing Liu, Wade T. Crow, Rolf H. Reichle
Summary: This study demonstrates that satellite-based surface soil moisture estimates are strongly correlated with subsequent springtime streamflow. The data has the potential to accurately predict seasonal streamflow several months in advance. In poorly instrumented regions, these estimates may outperform reanalysis soil moisture products.
NATURE COMMUNICATIONS
(2023)
Article
Meteorology & Atmospheric Sciences
Rolf H. Reichle, Qing Liu, Joseph Ardizzone, Wade T. Crow, Gabrielle J. M. de Lannoy, John S. Kimball, Randal D. Koster
Summary: The NASA SMAP mission's L4_SM product provides global soil moisture data using satellite and gauge-based precipitation observations. The use of IMERG precipitation data improves the accuracy of soil moisture estimates and addresses issues with previous L4_SM versions.
JOURNAL OF HYDROMETEOROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Elias C. Massoud, Lauren Andrews, Rolf Reichle, Andrea Molod, Jongmin Park, Sophie Ruehr, Manuela Girotto
Summary: The seasonal variability of the global hydrologic cycle has direct impacts on various human activities. Forecasting hydrometeorological variables on a subseasonal-to-seasonal (S2S) scale is an active area of research. NASA's GEOS S2S prediction system is developed for this purpose. We evaluate the forecast skill of GEOS-S2S hydrometeorological forecasts in the High Mountain Asia (HMA) region using various datasets. The results show that the forecast skill depends on lead time, variable memory, and validation dataset.
EARTH SYSTEM DYNAMICS
(2023)
Article
Engineering, Electrical & Electronic
Alexander Gruber, Rolf H. Reichle
Summary: This study investigates the assimilation of Soil Moisture Active Passive (SMAP) mission brightness temperature data into a land surface model to improve the simulation of soil moisture. The results show notable skill improvements in most regions, especially for the interannual variations.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2022)
Review
Water Resources
Gabrielle J. M. De Lannoy, Michel Bechtold, Clement Albergel, Luca Brocca, Jean Christophe Calvet, Alberto Carrassi, Wade T. Crow, Patricia de Rosnay, Michael Durand, Barton Forman, Gernot Geppert, Manuela Girotto, Harrie-Jan Hendricks Franssen, Tobias Jonas, Sujay Kumar, Hans Lievens, Yang Lu, Christian Massari, Valentijn R. N. Pauwels, Rolf H. Reichle, Susan Steele-Dunne
Summary: The rapid growth of land surface satellite data and model sophistication in the 21st century has opened up new opportunities for estimating multiple components of the water cycle through satellite-based land data assimilation. However, the increased level of detail in models and data also presents challenges in terms of dimensionality and the volume of observations to assimilate. Advanced data assimilation methods and efficient solutions are needed to address these challenges.
FRONTIERS IN WATER
(2022)
Article
Remote Sensing
Chen Zhang, Zhengwei Yang, Haoteng Zhao, Ziheng Sun, Liping Di, Rajat Bindlish, Pang -Wei Liu, Andreas Colliander, Wade Crow, Rick Mueller, Rolf H. Reichle, John Bolten, Simon H. Yueh
Summary: This paper presents an interoperable data service application system called Crop-CASMA, which facilitates the retrieval, analysis, visualization, and sharing of soil moisture data for the Conterminous United States (CONUS). The system provides satellite remote sensing data products and vegetation index data, and disseminates them using Open Geospatial Consortium (OGC) standards.
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
(2022)
Article
Engineering, Electrical & Electronic
Frederike Vincent, Michiel Maertens, Michel Bechtold, Esteban Jobbagy, Rolf H. Reichle, Veerle Vanacker, Jasper A. Vrugt, Jean-Pierre Wigneron, Gabrielle J. M. De Lannoy
Summary: In this study, the surface soil moisture, temperature, salinity, and vegetation in the Dry Chaco region of South America were investigated using satellite observations and simulations. The results showed that satellite-based soil moisture performed better than model simulations when evaluated against field data. Including salinity in the simulations improved the results, but the accuracy of salinity retrieval was still limited.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2022)