Liyin He
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A general framework for nitrogen deposition effects on soil respiration in global forests Open
Since the Industrial Revolution, human activities have altered atmospheric nitrogen (N) deposition to global forests, affecting carbon dioxide emissions from soils (soil respiration or SR) – one of the largest land-atmosphere carbon fluxes…
A general framework for nitrogen deposition effects on soil respiration in global forests Open
Soil respiration (SR) is one of the largest land-atmosphere carbon fluxes. Since the industrial revolution, human activities have altered atmospheric nitrogen (N) deposition in forests, potentially affecting biotic activities and changing …
Trade-offs in agricultural outcomes across farm sizes Open
Farm size plays a critical role in agriculture, influencing productivity, resource use efficiency, and environmental impacts. Smallholder farms, compared to large farms, often face constraints such as limited mechanisation and advanced tec…
Regional Inversion Shows Promise in Capturing Extreme‐Event‐Driven CO<sub>2</sub> Flux Anomalies but Is Limited by Atmospheric CO<sub>2</sub> Observational Coverage Open
Extreme climate events are becoming more frequent, with poorly understood implications for carbon sequestration by terrestrial ecosystems. A better understanding will critically depend on accurate and precise quantification of ecosystems r…
Global patterns of nitrogen saturation in forests Open
Since the industrial revolution, accelerated atmospheric nitrogen (N) deposition by human activities have increased N availability in forest ecosystems close to human settlements, potentially causing many nitrogen-limited forests to become…
View article: The weekly cycle of photosynthesis in Europe reveals the negative impact of particulate pollution on ecosystem productivity
The weekly cycle of photosynthesis in Europe reveals the negative impact of particulate pollution on ecosystem productivity Open
Aerosols can affect photosynthesis through radiative perturbations such as scattering and absorbing solar radiation. This biophysical impact has been widely studied using field measurements, but the sign and magnitude at continental scales…
Irrigation Expansion Required to Mitigate Yield Losses Under Climate Change Open
The "code" folder contains code and related data to (1) run regression to obtain crop yield sensitivities to temperature and precipitation, (2) conduct bootstrapping approach to resample crop data 1,000 times to derive regression coefficie…
Irrigation Expansion Required to Mitigate Yield Losses Under Climate Change Open
The "crop_production_summary.xlsx" gives the global and country-level aggregated crop production (e.g., wheat, maize, rice and barley) (unit: 10^12 kcal) during Baseline periods (1996-2005), 1.5°C and 3°C warming above pre-industrial level…
Regional inversion shows promise in capturing extreme-event-driven CO2 flux anomalies but is limited by atmospheric CO2 observational coverage Open
Extreme climate events are becoming more frequent, with poorly understood implications for carbon sequestration by terrestrial ecosystems. A better understanding will critically depend on accurate and precise quantification of ecosystems r…
Elucidating climatic drivers of photosynthesis by tropical forests Open
Tropical forests play a pivotal role in regulating the global carbon cycle. However, the response of these forests to changes in absorbed solar energy and water supply under the changing climate is highly uncertain. Three‐year (2018–2021) …
Unequal exposure to heatwaves in Los Angeles: Impact of uneven green spaces Open
Cities worldwide are experiencing record-breaking summer temperatures. Urban environments exacerbate extreme heat, resulting in not only the urban heat island but also intracity variations in heat exposure. Understanding these disparities …
Solutions to agricultural green water scarcity under climate change Open
Rain-fed agricultural systems, which solely depend on green water (i.e. soil moisture from rainfall), sustain ∼60% of global food production and are particularly vulnerable to vagaries in temperature and precipitation patterns, which are i…
Marked Impacts of Pollution Mitigation on Crop Yields in China Open
Plant growth and crop harvest are impacted by both climate change and air pollution. However, their relative importance in crop yields remains elusive, especially in heavily polluted regions. Here we develop crop yield prediction models, b…
Dataset for paper "Marked impacts of pollution mitigation on crop yields in China" Open
"corn.csv", "winterwheat.csv" and "midlatepaddy.csv" report historical crop yield (unit: kg/hectare)of corn, winter wheat and single cropping rice in China. "regression.ipynb" contains python code to (i) derive the sensitivity of crop yie…
Dataset for paper "Marked impacts of pollution mitigation on crop yields in China" Open
"corn.csv", "winterwheat.csv" and "midlatepaddy.csv" report historical crop yield (unit: kg/hectare)of corn, winter wheat and single cropping rice in China. "regression.ipynb" contains python code to (i) derive the sensitivity of crop yie…
Dataset for paper "Solutions to global agricultural green water scarcity under climate change" Open
These are datasets used to generate figures of paper "Solutions to global agricultural green water scarcity under climate change". (1) fig1_GWS_Baseline, fig1_GWS_1.5C and fig1_GWS_1.5C are NetCDF files reporting agricultural green water s…
Dataset for paper "Solutions to global agricultural green water scarcity under climate change" Open
These are datasets used to generate figures of paper "Solutions to global agricultural green water scarcity under climate change". (1) fig1_GWS_Baseline, fig1_GWS_1.5C and fig1_GWS_1.5C are NetCDF files reporting agricultural green water s…
Testing stomatal models at the stand level in deciduous angiosperm and evergreen gymnosperm forests using CliMA Land (v0.1) Open
At the leaf level, stomata control the exchange of water and carbon across the air–leaf interface. Stomatal conductance is typically modeled empirically, based on environmental conditions at the leaf surface. Recently developed stomatal op…
Comment on gmd-2021-154 Open
Abstract. At the leaf level, stomata control the exchange of water and carbon across the airâleaf interface. Stomatal conductance is typically modeled empirically, based on environmental conditions at the leaf surface. Recently developed…
Testing stomatal models at stand level in deciduous angiosperm and evergreen gymnosperm forests using CliMA Land (v0.1) Open
At the leaf level, stomata control the exchange of water and carbon across the air-leaf interface. Stomatal conductance is typically modeled empirically, based on environmental conditions at the leaf surface. Recently developed stomatal op…
COMMENT ON“RECENT GLOBAL DECLINE OF CO2 FERTILIZATION EFFECTS ON VEGETATION PHOTOSYNTHESIS” Open
Wang et al. (Science 370, 1295–1300, 2020) report a significant decline in CO$_2$ fertilization effects using photosynthesis proxies from long-term satellite records. We find that small systematic biases in AVHRR data impact their analysis…
Tracking Seasonal and Interannual Variability in Photosynthetic Downregulation in Response to Water Stress at a Temperate Deciduous Forest Open
The understanding and modeling of photosynthetic dynamics affected by climate variability can be highly uncertain. In this paper, we examined a well‐characterized eddy covariance site in a drought‐prone temperate deciduous broadleaf forest…
From the Ground to Space: Using Solar‐Induced Chlorophyll Fluorescence to Estimate Crop Productivity Open
Timely and accurate monitoring of crops is essential for food security. Here, we examine how well solar‐induced chlorophyll fluorescence (SIF) can inform crop productivity across the United States. Based on tower‐level observations and pro…
Cropland Carbon Uptake Delayed and Reduced by 2019 Midwest Floods Open
While large‐scale floods directly impact human lives and infrastructures, they also profoundly impact agricultural productivity. New satellite observations of vegetation activity and atmospheric CO 2 offer the opportunity to quantify the e…
Atmospheric Methane Emissions Correlate With Natural Gas Consumption From Residential and Commercial Sectors in Los Angeles Open
Legislation in the State of California mandates reductions in emissions of short‐lived climate pollutants of 40% from 2013 levels by 2030 for CH 4 . Identification of the sector(s) responsible for these emissions and their temporal and spa…