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csaybar authored Jul 14, 2024
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2 changes: 1 addition & 1 deletion assets/bibfiles/journal.bib
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Expand Up @@ -21,7 +21,7 @@ @article{CHAPARRO2024113993
author = {David Chaparro and Thomas Jagdhuber and María Piles and François Jonard and Anke Fluhrer and Mercè Vall-llossera and Adriano Camps and Carlos López-Martínez and Roberto Fernández-Morán and Martin Baur and Andrew F. Feldman and Anita Fink and Dara Entekhabi},
keywords = {Live fuel moisture content (LFMC), Gravimetric vegetation moisture (m), Vegetation optical depth, SMAP, AMSR-2, Sentinel-1, GEDI},
abstract = {Monitoring vegetation moisture conditions is paramount to better understand and assess drought impacts on vegetation, enhance crop yield predictions, and improve ecosystem models. Passive microwave remote sensing allows retrievals of the vegetation optical depth (VOD; [unitless]), which is directly proportional to the vegetation water content (VWC; in units of water mass per unit area [kg/m2]). However, VWC is largely dependent on the dry biomass and structure imprints on the VOD signal. Previously, statistical models have been used to isolate the water component from the biomass and structure components. Physically-based approaches have not yet been proposed for this goal. In this study, we present a multi-sensor semi-physical approach to retrieve the vegetation moisture from the VOD and express it as Live Fuel Moisture Content (LFMC [%]; the percentage of water mass per dry biomass unit). The study is performed in the western United States for the period April 2015 – December 2018. There, in situ LFMC samples are available for assessment. We rely on a VOD model based on vegetation height data from GEDI/Sentinel-2 and radar backscatter from Sentinel-1, which account for the biomass and structure components. Vegetation moisture is retrieved at L-, X- and Ku-bands by minimizing the difference between the modeled VOD and the VOD estimates from SMAP (L-band) and AMSR-2 (X- and Ku-band) satellites. Results show that the LFMC retrievals are independent of canopy height, land cover, and radar backscatter, demonstrating the capability of the proposed algorithm to separate water dynamics from the biomass/structure component in VOD. LFMC estimates at X- and Ku-bands reproduce well the expected spatio-temporal dynamics of in situ LFMC. Results show good agreement with in situ at a regional scale, with Pearson's correlations (r) between in situ LFMC samples and LFMC estimates of 0.64 (Ku-band), 0.60 (X-band) and 0.47 (L-band). Similar results are obtained independently for shrub and forest sites at X- and Ku-bands. In most comparisons between in situ and estimated LFMC, biases are below 10% of the dynamic range of LFMC. Performance at L-band is limited by the fact that this frequency senses the full vertical extent of the canopy, while in situ samples are taken only from top of canopy leaves to which X- and Ku-bands are much more sensitive. More insight will be needed for grasslands (r = 0.44 at X-band) using time-dynamic canopy height data. Furthermore, a pixel-scale assessment is conducted, showing a good agreement in most sites (r > 0.6). The proposed method can be tailored to exploit the synergies of past (e.g., AMSR-E), current (e.g., AMSR-2) and future satellite sensors such as CIMR and ROSE-L for global vegetation moisture mapping at different canopy layers.},
project = {ai4cs gva prometeo},
project = {ai4cs, gva, prometeo},
}

@article{Garcia24bgc,
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2 changes: 1 addition & 1 deletion content/publications/books.md
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---
title: "Publications - books"
title: "Books and book chapters"
params:
bibfiles:
- "bibfiles/books.bib"
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2 changes: 1 addition & 1 deletion content/publications/conferences.md
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---
title: "Publications - conferences"
title: "Conference papers"
params:
bibfiles:
- "bibfiles/conferences.bib"
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2 changes: 1 addition & 1 deletion content/publications/journals.md
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---
title: "Publications - Journal"
title: "Journal papers"
params:
bibfiles:
- "bibfiles/journal.bib"
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2 changes: 1 addition & 1 deletion content/publications/talks.md
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---
title: "Publications - talks"
title: "Invited talks"
params:
bibfiles:
- "bibfiles/talks.bib"
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4 changes: 4 additions & 0 deletions content/publications/technical_reports.md
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---
title: "Technical reports"

---
2 changes: 1 addition & 1 deletion content/publications/theses.md
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---
title: "Publications - theses"
title: "Msc and PhD Theses"
params:
bibfiles:
- "bibfiles/theses.bib"
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2 changes: 1 addition & 1 deletion hugo.toml
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Expand Up @@ -68,7 +68,7 @@ theme = "isp_uv"

[[menu.main]]
name = "Publications"
url = "/publications/"
url = "/publications/journals/"
weight = 6
[[menu.main]]
parent = "Publications"
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45 changes: 45 additions & 0 deletions static/js/bibtex_functions.js
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var bibtex_reader = new BibtexDisplay();
var constraints = {};

function add_handler(entry, value) {
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if (value == 'all') delete constraints[entry];
else constraints[entry] = value;
bibtex_reader.displayBibtex($("#bibtex_input").val(), $("#bibtex_display"), constraints);
if (typeof _altmetric != 'undefined') _altmetric.embed_init();
}

function add_projects() {
var projects = bibtex_reader.get_projects($("#bibtex_input").val(), constraints);
var n = 0;
$.each(projects, function (key, value) {
$('.projects').append('<button class="btn btn-normal btn-projects" type="button" value="' + key + '">' + key + ' <span class="badge">' + value + '</span></button>');
n++;
});
if (n == 0) return;
$('.btn-projects').click(function() {
add_handler('PROJECT', $(this).val());
});
$('.projects').removeClass('hide');
}

function add_years() {
var years = bibtex_reader.get_years($("#bibtex_input").val(), constraints);
var n = 0;
$.each(years, function (key, value) {
$('.years').append('<button class="btn btn-primary btn-years" type="button" value="' + key + '"> ' + key + ' <span class="badge">' + value + '</span></button>');
n++;
});
if (n == 0) return;
$('.btn-years').click(function() {
add_handler('YEAR', $(this).val());
});
$('.years').removeClass('hide');
}

function my_bibtex_js_draw() {
$(".bibtex_template").hide();
bibtex_reader.displayBibtex($("#bibtex_input").val(), $("#bibtex_display"), constraints);
add_projects();
add_years();
}
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