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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Volume 11, issue 9 | Copyright
Geosci. Model Dev., 11, 3605-3621, 2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Model description paper 05 Sep 2018

Model description paper | 05 Sep 2018

The Land surface Data Toolkit (LDT v7.2) – a data fusion environment for land data assimilation systems

Kristi R. Arsenault1,2, Sujay V. Kumar2, James V. Geiger3, Shugong Wang1,2, Eric Kemp2,4, David M. Mocko1,2, Hiroko Kato Beaudoing2,5, Augusto Getirana2,5, Mahdi Navari2,5, Bailing Li2,5, Jossy Jacob2,4, Jerry Wegiel1,6, and Christa D. Peters-Lidard7 Kristi R. Arsenault et al.
  • 1Science Applications International Corporation, McLean, VA, USA
  • 2Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA
  • 3Science Data Processing Branch, NASA Goddard Space Flight Center, Greenbelt, MD, USA
  • 4Science Systems and Applications, Inc., Lanham, MD, USA
  • 5ESSIC, University of Maryland, College Park, MD, USA
  • 6Headquarters 557th Weather Wing, Offutt Air Force Base, NE, USA
  • 7Earth Sciences Division, NASA Goddard Space Flight Center, Greenbelt, MD, USA

Abstract. The effective applications of land surface models (LSMs) and hydrologic models pose a varied set of data input and processing needs, ranging from ensuring consistency checks to more derived data processing and analytics. This article describes the development of the Land surface Data Toolkit (LDT), which is an integrated framework designed specifically for processing input data to execute LSMs and hydrological models. LDT not only serves as a preprocessor to the NASA Land Information System (LIS), which is an integrated framework designed for multi-model LSM simulations and data assimilation (DA) integrations, but also as a land-surface-based observation and DA input processor. It offers a variety of user options and inputs to processing datasets for use within LIS and stand-alone models. The LDT design facilitates the use of common data formats and conventions. LDT is also capable of processing LSM initial conditions and meteorological boundary conditions and ensuring data quality for inputs to LSMs and DA routines. The machine learning layer in LDT facilitates the use of modern data science algorithms for developing data-driven predictive models. Through the use of an object-oriented framework design, LDT provides extensible features for the continued development of support for different types of observational datasets and data analytics algorithms to aid land surface modeling and data assimilation.

Publications Copernicus
Short summary
The Earth’s land surface hydrology and physics can be represented in highly sophisticated models known as land surface models. The Land surface Data Toolkit (LDT) software was developed to meet these models’ input processing needs. LDT supports a variety of land surface and hydrology models and prepares the inputs (e.g., meteorological data, satellite observations to be assimilated into a model), which can be used for inter-model studies and to initialize weather and climate forecasts.
The Earth’s land surface hydrology and physics can be represented in highly sophisticated...