Evolving climate network perspectives on global surface air temperature effects of ENSO and strong volcanic eruptions

Autor(es)

Kittel, Tim ^{[1, 2]} ; Ciemer, Catrin ^{[1, 2]} ; Lotfi, Nastaran ^[3] ; Peron, Thomas ^[3] ; Rodrigues, Francisco ^[3] ; Kurths, Juergen ^{[1, 2, 4]} ; Donner, Reik V. ^{[1, 5, 6]}

Afiliação do(s) autor(es)

^[1] Potsdam Inst Climate Impact Res PIK, Res Dept Complex Sci 6, Telegrafenberg A31, D-14473 Potsdam - Germany

^[2] Humboldt Univ, Dept Phys, Newtonstra 15, D-12489 Berlin - Germany

^[3] Univ Sao Paulo, Inst Math & Comp Sci, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos - Brazil

^[4] Nizhnii Novgorod State Univ, Dept Control Theory, 23 Gagarin Ave, Nizhnii Novgorod 606950 - Russia

^[5] Magdeburg Stendal Univ Appl Sci, Dept Water Environm Construct & Safety, Breitscheidstra 2, D-39114 Magdeburg - Germany

^[6] Potsdam Inst Climate Impact Res PIK, Res Dept Earth Syst Anal 1, Telegrafenberg A31, D-14473 Potsdam - Germany

• Tipo de documento: Artigo Científico
• Fonte: European Physical Journal-Special Topics; v. 230, n. 14-15 AUG 2021.
• Citações Web of Science: 1

Resumo

Episodically occurring internal (climatic) and external (non-climatic) disruptions of normal climate variability are known to both affect spatio-temporal patterns of global surface air temperatures (SAT) at time-scales between multiple weeks and several years. The magnitude and spatial manifestation of the corresponding effects depend strongly on the specific type of perturbation and may range from weak spatially coherent yet regionally confined trends to a global reorganization of co-variability due to the excitation or inhibition of certain large-scale teleconnectivity patterns. Here, we employ functional climate network analysis to distinguish qualitatively the global climate responses to different phases of the El Nino-Southern Oscillation (ENSO) from those to the three largest volcanic eruptions since the mid-20th century as the two most prominent types of recurrent climate disruptions. Our results confirm that strong ENSO episodes can cause a temporary breakdown of the normal hierarchical organization of the global SAT field, which is characterized by the simultaneous emergence of consistent regional temperature trends and strong teleconnections. By contrast, the most recent strong volcanic eruptions exhibited primarily regional effects rather than triggering additional long-range teleconnections that would not have been present otherwise. By relying on several complementary network characteristics, our results contribute to a better understanding of climate network properties by differentiating between climate variability reorganization mechanisms associated with internal variability versus such triggered by non-climatic abrupt and localized perturbations. (AU)

• Processo FAPESP: 16/23827-6 - Análise de processos epidêmicos e de sincronização em redes complexas
• Beneficiário: Thomas Kaue Dal Maso Peron
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 20/08359-1 - Comportamento social e processos epidêmicos em redes sociais
• Beneficiário: Nastaran Lotfi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado