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Integrating a New Terrestrial Biosphere Model and Remote Sensing Observations to Improve Gross Primary Productivity Estimates in Forest Ecosystems
Integrating a New Terrestrial Biosphere Model and Remote Sensing Observations to Improve Gross Primary Productivity Estimates in Forest Ecosystems
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104843
- ISBN
- 9798290965253
- DDC
- 634.9
- 저자명
- Liu, Haoran.
- 서명/저자
- Integrating a New Terrestrial Biosphere Model and Remote Sensing Observations to Improve Gross Primary Productivity Estimates in Forest Ecosystems
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 178 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Chen, Min.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
- 초록/해제
- 요약Terrestrial vegetation assimilates atmospheric CO₂ through photosynthesis, producing organic compounds that sustain ecosystem functions and support human needs for food and fuel. At the ecosystem scale, this photosynthetic carbon assimilation is referred to as gross primary productivity (GPP)-the largest carbon flux in the global carbon cycle. However, estimating GPP using terrestrial biosphere models (TBMs) remain challenging due to our limited understanding of vegetation structural dynamics and functional traits, as well as their contributions to photosynthesis. This dissertation develops an integrated model-data fusion framework that combines advanced radiative transfer models, remote sensing data, and TBMs to improve GPP estimates, vegetation structural dynamics, and functional traits. Specifically, I developed the Terrestrial Ecosystem Carbon cycle Simulator (TECs), a newly developed TBM that couples a spectral invariant property (SIP)-based radiative transfer model with modules for photosynthesis, energy balance, and carbon cycling. TECs simulates bi-directional canopy reflectance with high spectral resolution, allowing direct comparison with low-level satellite observations without introducing additional uncertainties. Calibration and validation at the Harvard Forest (HARV) site of the National Ecological Observatory Network (NEON) demonstrate that TECs accurately simulates net ecosystem exchange (NEE), hyperspectral reflectance, and land surface temperature (LST). Moreover, a model-data fusion framework was developed to independently utilize spaceborne hyperspectral reflectance, multispectral reflectance, and leaf area index (LAI) to optimize TECs GPP simulations through optimizing canopy structure and leaf traits parameterizations. This aims to evaluate the unique contributions of spaceborne datasets to canopy structure, leaf traits, and GPP simulations. Results indicate that hyperspectral reflectance outperforms multispectral reflectance in both improving GPP estimates and reducing uncertainties. Both hyperspectral and multispectral reflectance outperform LAI, with information from both canopy structure and leaf traits, thus offering a joint constraint on GPP simulations. Meanwhile, I extended TECs to include solar-induced chlorophyll fluorescence (SIF) emissions at both leaf and canopy scales, resulting in the development of TECs-SIF. At four selected forest sites, TECs-SIF successfully represented SIF-GPP relationships across various temporal scales, providing a novel pathway for integrating SIF observations to further constrain GPP in TBMs. Collectively, this dissertation demonstrates the potential of integrating satellite-based surface reflectance, especially hyperspectral reflectance, in improving TBM-based GPP simulations. The TECs-SIF also provides valuable insights for enhancing GPP modeling by synergistically leveraging next-generation hyperspectral missions as well as the SIF observations.
- 일반주제명
- Forestry
- 일반주제명
- Ecology
- 일반주제명
- Remote sensing
- 기타저자
- The University of Wisconsin - Madison Forestry
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202104843
■006m o d
■007cr#unu||||||||
■020 ▼a9798290965253
■035 ▼a(MiAaPQ)AAI32173175
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a634.9
■1001 ▼aLiu, Haoran.
■24510▼aIntegrating a New Terrestrial Biosphere Model and Remote Sensing Observations to Improve Gross Primary Productivity Estimates in Forest Ecosystems
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a178 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Chen, Min.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
■520 ▼aTerrestrial vegetation assimilates atmospheric CO₂ through photosynthesis, producing organic compounds that sustain ecosystem functions and support human needs for food and fuel. At the ecosystem scale, this photosynthetic carbon assimilation is referred to as gross primary productivity (GPP)-the largest carbon flux in the global carbon cycle. However, estimating GPP using terrestrial biosphere models (TBMs) remain challenging due to our limited understanding of vegetation structural dynamics and functional traits, as well as their contributions to photosynthesis. This dissertation develops an integrated model-data fusion framework that combines advanced radiative transfer models, remote sensing data, and TBMs to improve GPP estimates, vegetation structural dynamics, and functional traits. Specifically, I developed the Terrestrial Ecosystem Carbon cycle Simulator (TECs), a newly developed TBM that couples a spectral invariant property (SIP)-based radiative transfer model with modules for photosynthesis, energy balance, and carbon cycling. TECs simulates bi-directional canopy reflectance with high spectral resolution, allowing direct comparison with low-level satellite observations without introducing additional uncertainties. Calibration and validation at the Harvard Forest (HARV) site of the National Ecological Observatory Network (NEON) demonstrate that TECs accurately simulates net ecosystem exchange (NEE), hyperspectral reflectance, and land surface temperature (LST). Moreover, a model-data fusion framework was developed to independently utilize spaceborne hyperspectral reflectance, multispectral reflectance, and leaf area index (LAI) to optimize TECs GPP simulations through optimizing canopy structure and leaf traits parameterizations. This aims to evaluate the unique contributions of spaceborne datasets to canopy structure, leaf traits, and GPP simulations. Results indicate that hyperspectral reflectance outperforms multispectral reflectance in both improving GPP estimates and reducing uncertainties. Both hyperspectral and multispectral reflectance outperform LAI, with information from both canopy structure and leaf traits, thus offering a joint constraint on GPP simulations. Meanwhile, I extended TECs to include solar-induced chlorophyll fluorescence (SIF) emissions at both leaf and canopy scales, resulting in the development of TECs-SIF. At four selected forest sites, TECs-SIF successfully represented SIF-GPP relationships across various temporal scales, providing a novel pathway for integrating SIF observations to further constrain GPP in TBMs. Collectively, this dissertation demonstrates the potential of integrating satellite-based surface reflectance, especially hyperspectral reflectance, in improving TBM-based GPP simulations. The TECs-SIF also provides valuable insights for enhancing GPP modeling by synergistically leveraging next-generation hyperspectral missions as well as the SIF observations.
■590 ▼aSchool code: 0262.
■650 4▼aForestry
■650 4▼aEcology
■650 4▼aRemote sensing
■653 ▼aTerrestrial biosphere models
■653 ▼aSpectral invariant property
■653 ▼aNational Ecological Observatory Network
■653 ▼aLand surface temperature
■690 ▼a0478
■690 ▼a0799
■690 ▼a0329
■71020▼aThe University of Wisconsin - Madison▼bForestry.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359157▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


