Improving Noah land surface model performance using near real time surface albedo and green vegetation fraction

Yin, Jifu; Zhan, Xiwu; Zheng, Yu; Hain, Christopher; Ek, Michael; Wen, Jun; Fang, Li; Liu, Jicheng

doi:10.1016/j.agrformet.2015.12.001

Cited by 54 publications

(38 citation statements)

References 62 publications

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“…Studies suggested that global warming have accelerated the hydrological cycle, especially on the TP (Held and Soden 2006;Yang et al 2011;Yin et al 2013Yin et al , 2016You et al 2016b). An analysis of seasonal variation in the water budget components demonstrated that the dominant water cycling arises from the processes of precipitation and evaporation that are typical in the eastern TP (Zhang et al 2003).…”

Section: Responses Of Soil Moisture To Climate Warming On the Tpmentioning

confidence: 99%

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Detecting hydrological consistency between soil moisture and precipitation and changes of soil moisture in summer over the Tibetan Plateau

Meng

Luan

et al. 2017

Clim Dyn

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application, large number of missing gaps was shown on the west of the TP, where it is considered that the retrieval algorithms are largely affected by the permafrost covered in this region, leaving the ESA soil moisture product for further improvement. In application, the ESA soil moisture product was used to study the response of surface soil moisture to climate change on the TP. With the rapid warming and the overall wetting of the TP, soil moisture increases on the central of the TP with the increase of precipitation, and decreases in the southeast TP with the precipitation deduction. However, it decreases in the west TP, where it was probably influenced by both the insignificant precipitation changes and the significant increase of evaporation.Keywords Hydrological consistency · ESA soil moisture product · Soil moisture · Precipitation · Trends · Tibetan Plateau Abstract As the first purely multi-decadal satellitebased soil moisture product that spans over 35 years (from November 1978 to December 2013) on a daily basis designed for climate application, the applicability of the European Space Agency (ESA) soil moisture product, including the hydrological consistency between the product and the observed precipitation and the product continuity on the Tibetan Plateau (TP) were investigated. The results show that there is significant degree between the ESA soil moisture product and the observed precipitation. The positive anomaly of the ESA soil moisture product can reflect the occurrences of precipitation, but the precipitation may not definitely lead to soil moisture anomaly, which largely depends on the precipitation amounts. For climate

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Section: Responses Of Soil Moisture To Climate Warming On the Tpmentioning

confidence: 99%

“…Under the rapid warming circumstances, most regions of the TP have been experiencing wetting in the last three decades (Yin et al 2016). The accelerated climate change on the TP has caused many environmental changes, such as permafrost degradation, glacier retreat and snow melt etc.…”

Section: Introductionmentioning

confidence: 99%

Detecting hydrological consistency between soil moisture and precipitation and changes of soil moisture in summer over the Tibetan Plateau

Meng

Luan

et al. 2017

Clim Dyn

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“…Using this qualified MODIS Normalized Difference Vegetation Index (NDVI), the VF can be calculated as follows [33,41,55]:…”

Section: Vf Data From Modis Vegetation Indices (Vi) (Mod13a2)mentioning

confidence: 99%

“…In this area, explore the climatic effects of land use cover change (LUCC) [14,37,[40][41][42][43]. The results from the simulations using actual albedo, LAI, and VF indicated that LUCC led to local cooling of 1 • C in the summer and local warming exceeding 0.8 • C in the winter.…”

Section: Introductionmentioning

confidence: 99%

Improved Atmospheric Modelling of the Oasis-Desert System in Central Asia Using WRF with Actual Satellite Products

et al. 2017

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Abstract:Because of the use of outdated terrestrial datasets, regional climate models (RCMs) have a limited ability to accurately simulate weather and climate conditions over heterogeneous oasis-desert systems, especially near large mountains. Using actual terrestrial datasets from satellite products for RCMs is the only possible solution to the limitation; however, it is impractical for long-period simulations due to the limited satellite products available before 2000 and the extremely time-and labor-consuming processes involved. In this study, we used the Weather Research and Forecasting (WRF) model with observed estimates of land use (LU), albedo, Leaf Area Index (LAI), and green Vegetation Fraction (VF) datasets from satellite products to examine which terrestrial datasets have a great impact on simulating water and heat conditions over heterogeneous oasis-desert systems in the northern Tianshan Mountains. Five simulations were conducted for 1-31 July in both 2010 and 2012. The decrease in the root mean squared error and increase in the coefficient of determination for the 2 m temperature (T2), humidity (RH), latent heat flux (LE), and wind speed (WS) suggest that these datasets improve the performance of WRF in both years; in particular, oasis effects are more realistically simulated. Using actual satellite-derived fractional vegetation coverage data has a much greater effect on the simulation of T2, RH, and LE than the other parameters, resulting in mean error correction values of 62%, 87%, and 92%, respectively. LU data is the primary parameter because it strongly influences other secondary land surface parameters, such as LAI and albedo. We conclude that actual LU and VF data should be used in the WRF for both weather and climate simulations.

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“…Land use/cover products are essential input datasets in land surface modelling or climate modelling [1,2]. Using high accuracy land cover datasets provides reliable information on carbon, water, and nitrogen processes for further ecology, climate, and hydrology studies [3,4].…”

Section: Introductionmentioning

confidence: 99%

Uncertainties in Classification System Conversion and an Analysis of Inconsistencies in Global Land Cover Products

Zhang

Maeyer

et al. 2017

IJGI

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Abstract:In this study, using the common classification systems of IGBP-17, IGBP-9, IPCC-5 and TC (vegetation, wetlands and others only), we studied spatial and areal inconsistencies in the three most recent multi-resource land cover products in a complex mountain-oasis-desert system and quantitatively discussed the uncertainties in classification system conversion. This is the first study to compare these products based on terrain and to quantitatively study the uncertainties in classification system conversion. The inconsistencies and uncertainties decreased from high to low levels of aggregation (IGBP-17 to TC) and from mountain to desert areas, indicating that the inconsistencies are not only influenced by the level of thematic detail and landscape complexity but also related to the conversion uncertainties. The overall areal inconsistency in the comparison of the FROM-GLC and GlobCover 2009 datasets is the smallest among the three pairs, but the smallest overall spatial inconsistency was observed between the FROM-GLC and MODISLC. The GlobCover 2009 had the largest conversion uncertainties due to mosaic land cover definition, with values up to 23.9%, 9.68% and 0.11% in mountainous, oasis and desert areas, respectively. The FROM-GLC had the smallest inconsistency, with values less than 4.58%, 1.89% and 1.2% in corresponding areas. Because the FROM-GLC dataset uses a hierarchical classification scheme with explicit attribution from the second level to the first, this system is suggested for producers of map land cover products in the future.

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Improving Noah land surface model performance using near real time surface albedo and green vegetation fraction

Cited by 54 publications

References 62 publications

Detecting hydrological consistency between soil moisture and precipitation and changes of soil moisture in summer over the Tibetan Plateau

Detecting hydrological consistency between soil moisture and precipitation and changes of soil moisture in summer over the Tibetan Plateau

Improved Atmospheric Modelling of the Oasis-Desert System in Central Asia Using WRF with Actual Satellite Products

Uncertainties in Classification System Conversion and an Analysis of Inconsistencies in Global Land Cover Products

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