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Fix broken links (#230)
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slesaad authored Nov 21, 2023
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2 changes: 1 addition & 1 deletion datasets/noaa-cpfp-co2-point.data.mdx
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Tans, P.P.,Fung, I.Y., & Takahashi, T. (1990). Observational Constraints on the global atmospheric CO₂ budget. *Science, 247*, 1431-1438. [https://www.jstor.org/stable/2874222](https://www.jstor.org/stable/2874222)

Tans, P.P., Crotwell, A.M., & Thoning, K.W. (2017). Abundances of isotopologues and calibration of CO₂ greenhouse gas measurements. *Atmospheric Measurement Techniques, 10*, 7, 2669-2685. [https://doi.org/10.5194/amt-10-2669-2017[(https://doi.org/10.5194/amt-10-2669-2017)
Tans, P.P., Crotwell, A.M., & Thoning, K.W. (2017). Abundances of isotopologues and calibration of CO₂ greenhouse gas measurements. *Atmospheric Measurement Techniques, 10*, 7, 2669-2685. [https://doi.org/10.5194/amt-10-2669-2017](https://doi.org/10.5194/amt-10-2669-2017)

Thoning, K.W., Tans, P.P., Conway, T.J., & Waterman, L.S. (1987). NOAA/GMCC calibrations of CO₂-in-air reference gases: 1979-1985. NOAA Tech. Memo. (ERL ARL-150). Environmental Research Laboratories, Boulder, CO, 63 pp.

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2 changes: 1 addition & 1 deletion datasets/oco2geos-co2-daygrid-v10r.data.mdx
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Brad Weir, Lesley Ott and OCO-2 Science Team (2022), OCO-2 GEOS Level 3 daily, 0.5x0.625 assimilated CO₂ V10r, Greenbelt, MD, USA, Goddard Earth Sciences Data and Information Services Center (GES DISC), Accessed: [Data Access Date], [10.5067/Y9M4NM9MPCGH](https://doi.org/10.5067/Y9M4NM9MPCGH)

## Dataset Accuracy
Daily random error statistics (i.e. precisions) are calculated using [Desroziers et al. (2005) diagnostics](https://doi.org/10.1256/qj.05.108), and can be found in the precision data layer accompanying the XCO₂ data layer. For more information on how these diagnostics are used, please refer to the “Uncertainty quantification” section of the [OCO-2 GEOS L3 XCO₂ Product User’s Guide](https://docserver.gesdisc.eosdis.nasa.gov/public/project/OCO/OCO₂_GEOS_L3_User_Guide.pdf). For estimating systematic errors, analyses against independent data are performed. For more information on these analyses, please refer to Section 3 of the [OCO-2 GEOS L3 XCO₂ Product User’s Guide](https://docserver.gesdisc.eosdis.nasa.gov/public/project/OCO/OCO2_GEOS_L3_User_Guide.pdf).
Daily random error statistics (i.e. precisions) are calculated using [Desroziers et al. (2005) diagnostics](https://doi.org/10.1256/qj.05.108), and can be found in the precision data layer accompanying the XCO₂ data layer. For more information on how these diagnostics are used, please refer to the “Uncertainty quantification” section of the [OCO-2 GEOS L3 XCO₂ Product User’s Guide](https://docserver.gesdisc.eosdis.nasa.gov/public/project/OCO/OCO2_GEOS_L3_User_Guide.pdf). For estimating systematic errors, analyses against independent data are performed. For more information on these analyses, please refer to Section 3 of the [OCO-2 GEOS L3 XCO₂ Product User’s Guide](https://docserver.gesdisc.eosdis.nasa.gov/public/project/OCO/OCO2_GEOS_L3_User_Guide.pdf).

## Disclaimer
All data provided in the U.S. GHG Center has been transformed from the original format (NetCDF) into Cloud Optimized GeoTIFF ([COG](https://www.cogeo.org/)). Careful quality checks are used to ensure data transformation has been performed correctly. Apart from the data format, the OCO-2 GEOS Assimilated CO₂ Concentrations dataset is identical to the [OCO2_GEOS_L3CO2_DAY dataset available at GES DISC](https://doi.org/10.5067/Y9M4NM9MPCGH).
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2 changes: 1 addition & 1 deletion overrides/about.mdx
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3. Methane emission leaks from large events

The US GHG Center is built on open source principles and techniques. It allows users to access, explore, analyze, and download data and products. The US GHG Center provides access to a curated and evolving list of foundational GHG data. This includes sources such as ground observations from NASA, NIST, and NOAA; data collected from space-borne (ex. EMIT and OCO-2/3) and airborne (ex. AVIRIS-NG) platforms, and model-derived data and analyses. The US GHG Center includes curated EPA regulatory and research datasets as well as research data from NASA, NIST, and NOAA. It features data insights to introduce topics and data, user support for open data exploration via Jupyter notebooks, and an analysis hub for authorized users to perform advanced cloud data analysis with computational resources. All code supporting the US GHG Center system is fully open sourced and available for examination.
Begin your journey by exploring the “[Introduction to the US GHG Center.](/stories/intro-us-ghg-center)
Begin your journey by exploring the “<Link to='/stories/intro-us-ghg-center'>Introduction to the US GHG Center</Link>”.

Numerous stakeholder engagement activities will help scope and prioritize the evolution of US GHG Center during its 2-year demonstration phase and its longer term implementation.

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6 changes: 3 additions & 3 deletions overrides/components/page-footer/component.tsx
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import React, { useState, useEffect, useCallback } from "$veda-ui/react";
import { useLocation } from "$veda-ui/react-router-dom";
import styled from "$veda-ui/styled-components";
import { NavLink } from "$veda-ui/react-router-dom";
import { NavLink, Link } from "$veda-ui/react-router-dom";
import { Modal, ModalHeadline, ModalFooter } from "$veda-ui/@devseed-ui/modal";
import { FormCheckable } from "$veda-ui/@devseed-ui/form";
import {
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</FooterContent>
<FooterContacts>
<div>
<a href="/">
<Link to="/">
<span>By</span> <strong>US GHG Center</strong> <span>on</span>{" "}
<time dateTime={String(nowDate.getFullYear())}>
{nowDate.getFullYear()}
</time>
</a>
</Link>
{" • "}
<Tip
content={`Released on ${format(
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2 changes: 1 addition & 1 deletion stories/discovering-large-methane-emissions.stories.mdx
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<Block>
<Prose>
Methane plumes are currently visible in the <a href="/data-catalog/emit-ch4plume-v1" style={{ color: '#1565EF' }}>US GHG Center</a>.
Methane plumes are currently visible in the <Link to='/data-catalog/emit-ch4plume-v1'>US GHG Center</Link>.
</Prose>
</Block>

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20 changes: 10 additions & 10 deletions stories/tracking-greenhouse-gas-cycles.stories.mdx
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<Block>
<Prose>
The US GHG Center portal streamlines the analysis and visualization of CO₂ observations from ground and space alongside model-based estimates of land and ocean sinks.
* [NOAA station-based CO₂ observations](/data-catalog/noaa-cpfp-co2-point)
* [Daily gap-filled OCO-2 satellite data](/data-catalog/oco2geos-co2-daygrid-v10r)
* [Net ecosystem exchange and fire emissions](/data-catalog/casagfed-carbonflux-monthgrid-v3)
* [Ocean-atmosphere exchange](/data-catalog/eccodarwin-co2flux-monthgrid-v5)
* [Alternate estimates of land-atmosphere exchange based on atmospheric observations](/data-catalog/oco2-mip-co2budget-yeargrid-v1)
* <Link to='/data-catalog/noaa-cpfp-co2-point'>NOAA station-based CO₂ observations</Link>
* <Link to='/data-catalog/oco2geos-co2-daygrid-v10r'>Daily gap-filled OCO-2 satellite data</Link>
* <Link to='/data-catalog/casagfed-carbonflux-monthgrid-v3'>Net ecosystem exchange and fire emissions</Link>
* <Link to='/data-catalog/eccodarwin-co2flux-monthgrid-v5'>Ocean-atmosphere exchange</Link>
* <Link to='/data-catalog/oco2-mip-co2budget-yeargrid-v1'>Alternate estimates of land-atmosphere exchange based on atmospheric observations</Link>
</Prose>
</Block>

<Block>
<Prose>
## Natural Sources of Methane
Methane is a potent greenhouse gas. While less abundant than CO₂, the increase in atmospheric CH₄ is responsible for about one third of present-day climate change by some estimates. Methane sources are plentiful and represent a mix of [human activities](/stories/us-methane-sources) and natural sources. Depending on the context and specific GHG analysis, the definition of natural versus anthropogenic sources and sinks of emissions will vary, but can include such things as managed/unmanaged wetlands, wildfires, termites, and the ocean, for example. About 30% of total CH₄ emissions each year are from wetlands. The methane produced in wetlands has a distinctively lighter mass, or isotope, compared to fossil fuel sources. The increasing abundance of the lighter CH₄ isotope in the atmosphere suggests that wetlands are producing more methane as part of climate-change feedback linked to warming and changing precipitation patterns.
Methane is a potent greenhouse gas. While less abundant than CO₂, the increase in atmospheric CH₄ is responsible for about one third of present-day climate change by some estimates. Methane sources are plentiful and represent a mix of <Link to='/stories/us-methane-sources'>human activities</Link> and natural sources. Depending on the context and specific GHG analysis, the definition of natural versus anthropogenic sources and sinks of emissions will vary, but can include such things as managed/unmanaged wetlands, wildfires, termites, and the ocean, for example. About 30% of total CH₄ emissions each year are from wetlands. The methane produced in wetlands has a distinctively lighter mass, or isotope, compared to fossil fuel sources. The increasing abundance of the lighter CH₄ isotope in the atmosphere suggests that wetlands are producing more methane as part of climate-change feedback linked to warming and changing precipitation patterns.
</Prose>
</Block>

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<Block>
<Prose>
The US GHG Center datasets show: Changes in CH₄ detected at surface stations around the world, model-based estimates of wetland emissions, and estimates of environmental fluxes based on atmospheric data that can be used to refine wetland models.
* [NOAA station-based CH₄ observations](/data-catalog/noaa-cpfp-ch4-point)
* [Daily and monthly wetland emissions](/data-catalog/lpjwsl-wetlandch4-grid-v1)
* [Alternate estimates of CH₄ emissions using data from Japan’s GOSAT](/data-catalog/gosat-based-ch4budget-yeargrid-v1)
* [Estimates of CH₄ emissions based on isotopic data collected at surface stations](/data-catalog/tm54dvar-ch4flux-monthgrid-v1)
* <Link to='/data-catalog/noaa-cpfp-ch4-point'>NOAA station-based CH₄ observations</Link>
* <Link to='/data-catalog/lpjwsl-wetlandch4-grid-v1'>Daily and monthly wetland emissions</Link>
* <Link to='/data-catalog/gosat-based-ch4budget-yeargrid-v1'>Alternate estimates of CH₄ emissions using data from Japan’s GOSAT</Link>
* <Link to='/data-catalog/tm54dvar-ch4flux-monthgrid-v1'>Estimates of CH₄ emissions based on isotopic data collected at surface stations</Link>
</Prose>
</Block>

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13 changes: 3 additions & 10 deletions stories/us-methane-sources.stories.mdx
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<Prose>
## Tracking and Mapping Methane

Methane is the second most abundant greenhouse gas behind carbon dioxide (CO₂). Over the last two centuries, methane concentrations in the atmosphere have more than doubled, largely due to human-related activities. While there are <a href="/stories/tracking-greenhouse-gas-cycles">natural sources</a> of methane emissions, most methane comes from human activities, including agriculture, oil and natural gas systems, landfills, wastewater treatment, coal mining, stationary and mobile combustion, and other industrial processes. Because methane is a powerful GHG and has a relatively shorter lifetime in the atmosphere than CO₂, reducing methane emissions is one of the best opportunities for reducing near term global warming.
Methane is the second most abundant greenhouse gas behind carbon dioxide (CO₂). Over the last two centuries, methane concentrations in the atmosphere have more than doubled, largely due to human-related activities. While there are <Link to='/stories/tracking-greenhouse-gas-cycles'>natural sources</Link> of methane emissions, most methane comes from human activities, including agriculture, oil and natural gas systems, landfills, wastewater treatment, coal mining, stationary and mobile combustion, and other industrial processes. Because methane is a powerful GHG and has a relatively shorter lifetime in the atmosphere than CO₂, reducing methane emissions is one of the best opportunities for reducing near term global warming.

Follow these links for more information on the [importance of methane](https://www.epa.gov/gmi/importance-methane), [global methane budget](https://www.globalcarbonproject.org/methanebudget/index.htm), and [observed trends](https://gml.noaa.gov/ccgg/trends_ch4/) in global atmospheric concentrations.
</Prose>
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<Prose>
## GHG Inventories - A Fundamental Tool Promoting International Climate Change Cooperation

The 1992 [United Nations Framework Convention on Climate Change](https://www.google.com/url?q=https://unfccc.int/resource/docs/convkp/conveng.pdf&sa=D&source=docs&ust=1695419649511030&usg=AOvVaw2r_M3u40Dcb9U77HDrHNRx) (UNFCCC) is an international treaty that established a framework for international cooperation to achieve “stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system” (Article 2). Towards this end, signatories to the UNFCCC are committed to developing and reporting “national inventories of anthropogenic emissions by sources and removals by sinks of all greenhouse gases” (Article 4). These inventories provide a scientific basis for tracking and planning emission mitigation efforts to achieve the long-term objective of the Convention. Inventory reporting is also a continued commitment under the 2015 U.N. Paris Agreement.
The 1992 [United Nations Framework Convention on Climate Change](https://unfccc.int/resource/docs/convkp/conveng.pdf) (UNFCCC) is an international treaty that established a framework for international cooperation to achieve “stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system” (Article 2). Towards this end, signatories to the UNFCCC are committed to developing and reporting “national inventories of anthropogenic emissions by sources and removals by sinks of all greenhouse gases” (Article 4). These inventories provide a scientific basis for tracking and planning emission mitigation efforts to achieve the long-term objective of the Convention. Inventory reporting is also a continued commitment under the 2015 U.N. Paris Agreement.
</Prose>
</Block>

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center={[-97.5, 39.8283]}
zoom={2.8}
/>
{/* <Image
src={new URL('./total-methane-emissions-2020.png', import.meta.url).href}
alt="visualization of total methane emissions from all sources shown on a map"
align="left"
attrAuthor="EPA"
attrUrl="/data-catalog/epa-ch4emission-yeargrid-v2express/explore"
/> */}
<Caption>
EPA Gridded Express 2020 - Total Methane Emissions
</Caption>
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<Block>
<Prose>
## Disclaimers
This gridded methane emissions dataset has been peer-reviewed as part of the associated manuscript, Maasakkers et al., 2023. Please see the <a href="/data-catalog/epa-ch4emission-yeargrid-v2express">Gridded Anthropogenic Methane Emissions Inventory dataset landing page</a> and links in the resources for additional details.
This gridded methane emissions dataset has been peer-reviewed as part of the associated manuscript, Maasakkers et al., 2023. Please see the <Link to="/data-catalog/epa-ch4emission-yeargrid-v2express">Gridded Anthropogenic Methane Emissions Inventory dataset landing page</Link> and links in the resources for additional details.
</Prose>
</Block>

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