Publications by authors named "Jianxu Han"
Waterborne nutrient loads to downstream ecosystems integrate contributions from both active and legacy sources. Effective mitigation of nutrient pollution and eutrophication around the world requires distinction of these, largely unknown, relative load contributions. Here, the active and legacy contributions to nitrogen and phosphorus loads are distinguished in numerous streams and associated hydrological catchments of Australia, China, Sweden, and USA.
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- Terrestrial ecosystem respiration is heavily influenced by temperature, creating a positive feedback loop that contributes to global warming, but this effect is moderated by water availability.
- The study analyzes CO flux measurements from 212 sites worldwide to understand how temperature and precipitation interact to affect ecosystem respiration.
- Findings indicate that there is a threshold of precipitation which determines whether respiration is temperature-limited or water-limited, suggesting that expanding water-limited areas due to climate change could weaken the positive feedback of respiratory processes on global warming.
It is still a great challenge to address nutrient pollution issues caused by various point sources and non-point sources on the watershed scale. Source contribution analysis based on watershed modeling can help watershed managers identify major pollution sources, propose effective management plans and make smart decisions. This study demonstrated a technical procedure for addressing watershed-scale water pollution problems in an agriculture-dominated watershed, using the Dengsha River Watershed (DRW) in Dalian, China as an example.
View Article and Find Full Text PDFObjective: The aim of this meta-analysis was to compare the effectiveness of Vypro II mesh and polypropylene mesh after inguinal hernia repair.
Summary Background Data: The use of prosthetic meshes has become increasingly popular in inguinal hernia surgery. Previous randomized controlled trials (RCTs) showed the relative merits and risks between Vypro II mesh and standard polypropylene mesh.