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DTSTART;VALUE=DATE:20250130
DTEND;VALUE=DATE:20261001
DTSTAMP:20260930T131631Z
CREATED:20250130T040513Z
LAST-MODIFIED:20260930T131631Z
UID:145372-1738195200-1790812799@www.a3veen.nl
SUMMARY:Planetary Solvency–finding our balance with nature - publication
DESCRIPTION:‘Planetary Solvency – finding our balance with nature’ is the IFoA’s fourth report in collaboration with climate scientists\, the report develops a framework for global risk management to address these risks and show how this approach can support future prosperity. \nIt also shows how a lack of realistic risk messaging to guide policy decisions has led to slower action than is needed. The report proposes a novel Planetary Solvency risk dashboard\, to provide decision-useful risk information to support policymakers to drive human activity within the finite bounds of the planet that we live on. The global economy could face a 50% loss in GDP between 2070 and 2090\, unless immediate policy action on risks posed by the climate crisis is taken. Populations are already impacted by food system shocks\, water insecurity\, heat stress and infectious diseases. If unchecked\, mass mortality\, mass displacement\, severe economic contraction and conflict become more likely. \nLinks:\nPlanetary solvency \n4 Billion Dead
URL:https://www.a3veen.nl/event/planetary-solvency-finding-our-balance-with-nature-publication/
CATEGORIES:Bibliotheek,kennis,Klimaat
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260805
DTEND;VALUE=DATE:20260806
DTSTAMP:20260814T095750Z
CREATED:20260804T235425Z
LAST-MODIFIED:20260814T095750Z
UID:143607-1785888000-1785974399@www.a3veen.nl
SUMMARY:Life 2.0: A Scalable Distributed Space-Telescope Array for Biosignature Spectroscopy - publication
DESCRIPTION:Answering the question “Are we alone?” requires atmospheric spectroscopy of nearby terrestrial planets\, scientists conclude in the report ‘Life 2.0: A Scalable Distributed Space-Telescope Array for Biosignature Spectroscopy‘. \nFor an Earth–Sun analog\, even the strongest transmission signals are expected to be of order 1 part per million (ppm). Unlike short-period planets\, Earth 2.0 planets transit only about once per year\, so single-transit sensitivity\, rather than stacking repeated observations\, is the fundamental design driver. Life 2.0 is a scalable space-mission concept linking Earth 2.0 candidates discovered by PLATO and the Earth 2.0 (ET) mission with atmospheric characterization and biosignature assessment. The baseline architecture comprises 900 one-meter space telescopes\, each equipped with a high-throughput Waveguide Integrated Miniature Spectrograph and an ultra-low-read-noise CMOS detector. After independent calibration\, spectra acquired simultaneously during a transit are combined\, providing the photon-collecting capability of an approximately 30-m aperture at the selected spectral resolution while retaining a modular architecture. The baseline 0.2–1.05 μm range covers O3\, O2\, H2O\, Rayleigh scattering\, and other diagnostics\, with extension into the infrared as detector technologies mature. Prototype Waveguide Spectral Lens devices have demonstrated 40–66% throughput at resolving powers from R∼200 to R∼20\,000. Lightweight silicon-carbide mirrors and sub-electron-noise CMOS detectors support replicated production. Life 2.0 must address detector systematics\, instrument stability\, and stellar variability; rather than assuming these limitations disappear\, it builds on calibration\, detector-characterization\, and data-analysis techniques advanced during the JWST era. The concept offers a scalable alternative to a monolithic 30-m-class space telescope and a staged pathway toward biosignature spectroscopy of nearby Earth-like planets. \nLinks:\nAnswering the question “Are we alone?” requires atmospheric spectroscopy of nearby terrestrial planets \nNine Hundred Telescopes and One Chance a Year
URL:https://www.a3veen.nl/event/life-2-0-a-scalable-distributed-space-telescope-array-for-biosignature-spectroscopy-publication/
CATEGORIES:Astronomie,Bibliotheek,Exoplaneet,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260813
DTEND;VALUE=DATE:20260814
DTSTAMP:20260813T094355Z
CREATED:20260812T234117Z
LAST-MODIFIED:20260813T094355Z
UID:143556-1786579200-1786665599@www.a3veen.nl
SUMMARY:Snelheid klimaatverandering beïnvloedt stabiliteit van de AMOC / Failure to track a stable AMOC state under rapid climate change - publication
DESCRIPTION:Snelle opwarming kan leiden tot kantelpunt\, langzamere opwarming waarschijnlijk niet\, snelheid klimaatverandering beïnvloedt stabiliteit van de Atlantische Meridionale Omwentelingscirculatie (AMOC). \nKlimaatwetenschappers laten al jaren zien dat de AMOC kan stilvallen als de aarde teveel opwarmt. Volgens het onderzoek ‘Failure to track a stable AMOC state under rapid climate change‘ van de Universiteit Utrecht is dat beeld niet helemaal volledig: het tempo van de opwarming speelt namelijk ook een belangrijke rol in het behouden van de stabiliteit van de AMOC. De Atlantische Meridionale Omwentelingscirculatie\, of AMOC\, is een systeem van oceaanstromingen dat warm water vanuit de tropen naar het noorden van Europa transporteert. De stroming speelt een grote rol in het verdelen van warmte over de aarde\, en zorgt er onder andere voor dat het klimaat in West-Europa relatief mild is. Wetenschappers vermoeden al langer dat deze ‘warmtemotor’ van de Atlantische Oceaan kan kantelen. Dat betekent dat de stroming binnen enkele decennia zou kunnen omslaan van de huidige\, krachtige staat naar een veel zwakkere staat. Zo’n kantelpunt kan worden geactiveerd door invloeden van buitenaf\, zoals een toenemende hoeveelheid smeltwater vanuit poolgebieden of opwarming van de aarde. \nLinks:\nSnelheid klimaatverandering beïnvloedt stabiliteit van de AMOC
URL:https://www.a3veen.nl/event/snelheid-klimaatverandering-beinvloedt-stabiliteit-van-de-amoc-failure-to-track-a-stable-amoc-state-under-rapid-climate-change-publication/
CATEGORIES:Bibliotheek,kennis,Klimaat,Zee
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