Supplemental Data for "Spatially Resolved Measurements in Tropical Reservoirs Reveal Elevated Methane Ebullition at River Inflows and at High Productivity"
type: Dataset
distribution: Landing page for the dataset
description: An increasing number of rivers are being dammed, particularly in the tropics, and reservoir water surfaces can be a substantial anthropogenic source of greenhouse gases. On average, 80% of the CO2-equivalent emission of reservoirs globally has been attributed to CH4, which is predominantly emitted via ebullition. Since ebullition is highly variable across space and time, both measuring and upscaling to an entire reservoir is challenging, and estimates of reservoir CH4 emission are therefore not well constrained. We measured CH4 ebullition at high spatial resolution with an echosounder and bubble traps in two reservoirs of different use (water storage and hydropower), size and productivity in the tropical Brazilian Atlantic Rainforest biome. Based on the spatially most well-resolved whole-reservoir ebullition measurements in the tropics so far, we found that mean CH4 ebullition was twice as high in river inflow areas than in other parts of the reservoirs, and more than four times higher in the eutrophic reservoir compared to the oligotrophic one. Using different upscaling approaches rendered similar whole-reservoir CH4 ebullition estimates, suggesting that highly spatially resolved measurements may be more important for constraining reservoir-wide CH4 estimates than choice of upscaling approach. The minimum sampling effort was high (>250 and >1700 30-m segments of hydroacoustic survey to reach within 50% or 80% accuracy, respectively). This suggests that traditional manual bubble trap measurements should be abandoned in favour of highly resolved measurements in order to get spatially representative estimates of CH4 ebullition, which accounted for 60 and 99% of total C emission in the two studied reservoirs. Dam construction is currently booming, especially in the tropics, both for production of renewable hydropower and for water supply to a growing population. However, reservoirs can emit large amounts of the greenhouse gases carbon dioxide and methane to the atmosph…
modified: 2024-06-25T08:48:07.129833Z
issued: 2020-12-23T00:00:00Z
publisher: Uppsala University
theme: ENVI
access rights: PUBLIC
qualified attribution: Attribution
  had role: principalInvestigator
  agent: Annika Linkhorst
    type: Agent
    account: https://orcid.org/0000-0002-3609-5107
    type: PrivateIndividual(s)
qualified attribution: Attribution
  had role: principalInvestigator
  agent: José Paranaíba
    type: Agent
    type: PrivateIndividual(s)
qualified attribution: Attribution
  had role: principalInvestigator
  agent: Raquel Mendonça
    type: Agent
    type: PrivateIndividual(s)
qualified attribution: Attribution
  had role: principalInvestigator
  agent: David Rudberg
    type: Agent
    type: PrivateIndividual(s)
qualified attribution: Attribution
  had role: principalInvestigator
  agent: Tonya DelSontro
    type: Agent
    type: PrivateIndividual(s)
qualified attribution: Attribution
  had role: principalInvestigator
  agent: Nathan Barros
    type: Agent
    type: PrivateIndividual(s)
qualified attribution: Attribution
  had role: principalInvestigator
  agent: Sebastian Sobek
    type: Agent
    type: PrivateIndividual(s)
keyword: ecology
keyword: ekologi @sv
keyword: climate
keyword: klimat @sv
keyword: environmental sciences
keyword: miljövetenskaper @sv
language: ENG

Landing page for the dataset
type: Distribution
title: Landningssida för datasetet @sv
access URL: Supplemental Data for "Spatially Resolved Measurements in Tropical Reservoirs Reveal Elevated Methane Ebullition at River Inflows and at High Productivity"
availability: stable

Uppsala University
type: Agent
name: Uppsala universitet @sv
type: Academia-ScientificOrganisation
source: https://ror.org/048a87296