@article {6380, title = {Plant responses to changing rainfall frequency and magnitude}, journal = {Nature Reviews Earth \& Environment}, volume = {5}, year = {2024}, pages = {276 - 294}, keywords = {LTER-KNZ}, doi = {10.1038/s43017-024-00534-0}, url = {https://www.nature.com/articles/s43017-024-00534-0}, author = {Feldman, Andrew F. and Feng, Xue and Felton, Andrew J. and Konings, Alexandra G. and Alan K. Knapp and Biederman, Joel A. and Poulter, Benjamin} } @article {6204, title = {Remotely sensed soil moisture can capture dynamics relevant to plant water uptake}, journal = {Water Resources Research}, volume = {59}, year = {2023}, pages = {e2022WR033814}, keywords = {LTER-KNZ}, doi = {10.1029/2022WR033814}, url = {https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022WR033814}, author = {Feldman, Andrew F. and Short Gianotti, Daniel J. and Dong, Jianzhi and Akbar, Ruzbeh and Crow, Wade T. and McColl, Kaighin A. and Konings, Alexandra G. and Nippert, J.B. and Tumber-D{\'a}vila, Shersingh Joseph and Holbrook, Noel M. and Rockwell, Fulton E. and Scott, Russell L. and Reichle, Rolf H. and Chatterjee, Abhishek and Joiner, Joanna and Poulter, Benjamin and Entekhabi, Dara} } @article {KNZ001863, title = {Asymmetric responses of primary productivity to altered precipitation simulated by ecosystem models across three long-term grassland sites}, journal = {Biogeosciences}, volume = {15}, year = {2018}, pages = {3421 - 3437}, abstract = {

Field measurements of aboveground net primary productivity (ANPP) in temperate grasslands suggest that both positive and negative asymmetric responses to changes in precipitation (P) may occur. Under normal range of precipitation variability, wet years typically result in ANPP gains being larger than ANPP declines in dry years (positive asymmetry), whereas increases in ANPP are lower in magnitude in extreme wet years compared to reductions during extreme drought (negative asymmetry). Whether the current generation of ecosystem models with a coupled carbon\–water system in grasslands are capable of simulating these asymmetric ANPP responses is an unresolved question. In this study, we evaluated the simulated responses of temperate grassland primary productivity to scenarios of altered precipitation with 14 ecosystem models at three sites: Shortgrass steppe (SGS), Konza Prairie (KNZ) and Stubai Valley meadow (STU), spanning a rainfall gradient from dry to moist. We found that (1)\ the spatial slopes derived from modeled primary productivity and precipitation across sites were steeper than the temporal slopes obtained from inter-annual variations, which was consistent with empirical data; (2)\ the asymmetry of the responses of modeled primary productivity under normal inter-annual precipitation variability differed among models, and the mean of the model ensemble suggested a negative asymmetry across the three sites, which was contrary to empirical evidence based on filed observations; (3)\ the mean sensitivity of modeled productivity to rainfall suggested greater negative response with reduced precipitation than positive response to an increased precipitation under extreme conditions at the three sites; and (4)\ gross primary productivity (GPP), net primary productivity (NPP), aboveground NPP (ANPP) and belowground NPP (BNPP) all showed concave-down nonlinear responses to altered precipitation in all the models, but with different curvatures and mean values. Our results indicated that most models overestimate the negative drought effects and/or underestimate the positive effects of increased precipitation on primary productivity under normal climate conditions, highlighting the need for improving eco-hydrological processes in those models in the future.

}, keywords = {LTER-KNZ}, doi = {10.5194/bg-15-3421-2018}, url = {https://www.biogeosciences.net/15/3421/2018/}, author = {Wu, Donghai and Ciais, Philippe and Viovy, Nicolas and Alan K. Knapp and K.R. Wilcox and Michael Bahn and M.D. Smith and Vicca, Sara and Fatichi, Simone and Zscheischler, Jakob and He, Yue and Li, Xiangyi and Ito, Akihiko and Arneth, Almut and Harper, Anna and Ukkola, Anna and Paschalis, Athanasios and Poulter, Benjamin and Peng, Changhui and Ricciuto, Daniel and Reinthaler, David and Chen, Guangsheng and Tian, Hanqin and Genet, {\'e}l{\`e}ne and Mao, Jiafu and Ingrisch, Johannes and Nabel, Julia E. S. M. and Pongratz, Julia and Lena R. Boysen and Kautz, Markus and Schmitt, Michael and Meir, Patrick and Zhu, Qiuan and R. Hasibeder and Sippel, Sebastian and Dangal, Shree R. S. and Sitch, Stephen and Shi, Xiaoying and Wang, Yingping and Luo, Yiqi and Liu, Yongwen and Piao, Shilong} }