Matthias Münnich


Last Name

Münnich

First Name

Matthias

ORCID

0000-0003-3292-2934

Organisational unit

03731 - Gruber, Nicolas / Gruber, Nicolas

Filters

2012 - 2019362020 - 202561
Reset filters

Search Results

Publications 1 - 10 of 97
  • Column-Compound Extremes in the Global Ocean
    Item type: Journal Article
    Wong, Joel; Münnich, Matthias; Gruber, Nicolas (2024)
    AGU Advances
    Marine extreme events such as marine heatwaves, ocean acidity extremes and low oxygen extremes can pose a substantial threat to marine organisms and ecosystems. Such extremes might be particularly detrimental (a) when they are compounded in more than one stressor, and (b) when the extremes extend substantially across the water column, restricting the habitable space for marine organisms. Here, we use daily output of a hindcast simulation (1961–2020) from the ocean component of the Community Earth System Model to characterize such column-compound extreme events (CCX), employing a relative threshold approach to identify extremes and requiring them to extend vertically over at least 50 m. The diagnosed CCX are prevalent, occupying worldwide in the 1960s about 1% of the volume contained within the top 300 m. Over the duration of our simulation, CCX become more intense, last longer, and occupy more volume, driven by the trends in ocean warming and ocean acidification. For example, the triple CCX expanded 39-fold, now last 3-times longer, and became 6-times more intense since the early 1960s. Removing this effect with a moving baseline permits us to better understand the key characteristics of CCX, revealing a typical duration of 10–30 days and a predominant occurrence in the Tropics and high latitudes, regions of high potential biological vulnerability. Overall, the CCX fall into 16 clusters, reflecting different patterns and drivers. Triple CCX are largely confined to the tropics and the North Pacific and tend to be associated with the El Niño-Southern Oscillation.
  • Characteristics of Recent Column-Compound Extremes in the Global Ocean
    Item type: Other Conference Item
    Wong, Joel; Gruber, Nicolas; Münnich, Matthias (2023)
    EGUsphere
    Marine extreme events can be detrimental to organisms and ecosystems across the global ocean. Marine heatwaves (MHW), ocean acidity extremes (OAX) and low oxygen extremes (LOX) occur everywhere, superimposed on the already changing trends of temperature, pH, and oxygen. When such extremes concurrently occur in the vertical column, the habitable space for marine organisms can be severely reduced. We use daily output from a hindcast simulation with the Community Earth System Model coupled with Biological Elemental Cycling (CESM-BEC) for the period 1961-2020 to characterise such compound extremes. Extreme conditions are identified on a moving baseline with the 95th or 5th percentile, and an additional absolute threshold of 150 μM for low oxygen conditions. To investigate compound events in the vertical dimension, at least 50 m out of the top 300 m is required to be extreme with respect to each stressor. Such an event is termed a column-compound extreme event (CCX). On average, 1% of the global ocean volume is occupied by CCXs and up to 5% at maximum. On a fixed baseline these values increase to 8% and 27% respectively. CCXs decrease habitable space by up to 75% and have high intensity index of more than 2 in many regions around the globe. El Niño-Southern Oscillation events are found to be strongly associated with CCXs in the tropical and subtropical Pacific, but also other ocean basins through teleconnections. The global volume of CCXs is expected in increase in the future, exacerbating impacts and reducing habitable space of marine organisms.
  • Characterisation of low oxygen extreme events in the Eastern Tropical Pacific between 1979 and 2016
    Item type: Other Conference Item
    Köhn, Eike; Münnich, Matthias; Vogt, Meike; et al. (2020)
    EGUsphere
  • ENSO and the fate of coastal production in the California Current System from 1979 to 2015
    Item type: Conference Poster
    Frischknecht, Martin; Münnich, Matthias; Lovecchio, Elisa; et al. (2016)
  • Origin, Transformation, and Fate: The Three-Dimensional Biological Pump in the California Current System
    Item type: Journal Article
    Frischknecht, Martin; Münnich, Matthias; Gruber, Nicolas (2018)
    Journal of Geophysical Research: Oceans
  • Climatic modulation of recent trends in ocean acidification in the California Current System
    Item type: Journal Article
    Turi, Giuliana; Lachkar, Zouhair; Gruber, Nicolas; et al. (2016)
    Environmental Research Letters
  • Southern Ocean coccolithophore biogeography – controlling factors and implications for global biogeochemical cycles
    Item type: Other Conference Item
    Nissen, Cara; Vogt, Meike; Münnich, Matthias; et al. (2017)
    Geophysical Research Abstracts
  • Drivers of Southern Ocean Heat and Carbon Storage Patterns: Role of surface boundary conditions
    Item type: Presentation
    Hague, Mark; Münnich, Matthias; Gruber, Nicolas (2021)
  • Oxygen extreme events in the Eastern Tropical South Pacific (ETSP)
    Item type: Other Conference Item
    Köhn, Eike; Münnich, Matthias; Vogt, Meike; et al. (2019)
  • Interannual variability in the cross-shore exchange of carbon and nutrients in the California Current System
    Item type: Presentation
    Frischknecht, Martin; Münnich, Matthias; Gruber, Nicolas (2015)
Publications 1 - 10 of 97