Solar forcing as an important trigger for West Greenland sea-ice variability over the last millennium

Sha, Longbin; Jiang, Hui; Seidenkrantz, Marit‐Solveig; Muscheler, Raimund; Zhang, Xu; Knudsen, Mads Faurschou; Olsen, Jesper; Knudsen, Karen Luise; Zhang, Weiguo

doi:10.1016/j.quascirev.2015.11.002

Cited by 33 publications

(24 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Internal climate fluctuations are also linked with sea ice cover fluctuations, which are an important component of the climate system at high latitude (Miles et al, 2014;Sha et al, 2015;Screen and Francis, 2016). The relationship between the AMO, the sea ice extent fluctuations and climate variability recorded in the North Atlantic is well illustrated www.clim-past.net/14/101/2018/ Clim.…”

Section: Recent Warming and Internal Climate Oscillationsmentioning

confidence: 99%

Climate variability in the subarctic area for the last 2 millennia

et al. 2018

View full text Add to dashboard Cite

Abstract.To put recent climate change in perspective, it is necessary to extend the instrumental climate records with proxy data from paleoclimate archives. Arctic climate variability for the last 2 millennia has been investigated using statistical and signal analyses from three regionally averaged records from the North Atlantic, Siberia and Alaska based on many types of proxy data archived in the Arctic 2k database v1.1.1. In the North Atlantic and Alaska, the major climatic trend is characterized by long-term cooling interrupted by recent warming that started at the beginning of the 19th century. This cooling is visible in the Siberian region at two sites, warming at the others. The cooling of the Little Ice Age (LIA) was identified from the individual series, but it is characterized by wide-range spatial and temporal expression of climate variability, in contrary to the Medieval Climate Anomaly. The LIA started at the earliest by around AD 1200 and ended at the latest in the middle of the 20th century. The widespread temporal coverage of the LIA did not show regional consistency or particular spatial distribution and did not show a relationship with archive or proxy type either. A focus on the last 2 centuries shows a recent warming characterized by a well-marked warming trend parallel with increasing greenhouse gas emissions. It also shows a multidecadal variability likely due to natural processes acting on the internal climate system on a regional scale. A ∼ 16-30-year cycle is found in Alaska and seems to be linked to the Pacific Decadal Oscillation, whereas ∼ 20-30-and ∼ 50-90-year periodicities characterize the North Atlantic climate variability, likely in relation with the Atlantic Multidecadal Oscillation. These regional features are probably linked to the sea ice cover fluctuations through ice-temperature positive feedback.

show abstract

Section: Recent Warming and Internal Climate Oscillationsmentioning

confidence: 99%

Climate variability in the subarctic area for the last 2 millennia

et al. 2018

View full text Add to dashboard Cite

show abstract

“…(a) The reconstructed SST W of core MD05‐2908; (b) changes in the standardized IAS (index of abnormal snow) (Chu et al, ); (c) running correlation coefficient between SST W and the standardized IAS (calculated for moving 250 year windows); (d) sea ice concentration from core GA306‐GC4, West Greenland (Sha et al, ), and (e) sea‐salt ion (Na + ) in the GISP2 ice core (Mayewski et al, ). Actual data are shown as gray curves; smoothed records (20 year running averages) are denoted by bold curves in color.…”

Section: Resultsmentioning

confidence: 99%

“…According to Ma, Wang, and Zhang () and Zhou and Wang (), the reduction in Arctic sea ice cover could potentially affect the overall climate of the Northern Hemisphere. Consequently, we also compared our SST W in the southern Okinawa Trough with reconstructed Arctic sea ice records (Mayewski et al, ; Sha et al, ) during the last millennium (Figures d and e). The diatom‐based sea ice concentration (SIC) reconstruction can be used to infer Arctic sea ice cover variability, which is supported by the good correlation between the reconstructed SIC and the satellite SIC data for the period 1979–2006 C.E.…”

Section: Resultsmentioning

confidence: 99%

“…Diatoms are one of the most sensitive and robust indicators in paleoceanographic and paleoclimatic studies, and are widely used as a proxy for SST, such as diatom temperature (Td′) values (Kanaya & Koizumi, ; Koizumi et al, ) and SST reconstructions based on diatom‐transfer functions (Berner et al, ; Birks & Koç, ; Jiang et al, ; Justwan & Koç, ; Miettinen et al, ). They are also used as a proxy for past sea ice variability (e.g., sea ice concentration and IP25) in both the Northern and Southern Hemispheres (e.g.Belt et al, ; Crosta, Pichon, & Burckle, ; de Vernal et al, ; Krawczyk et al, , ; Müller et al, ; Sha et al, , , ). A previous study showed that changes in surface diatom assemblages in the western Pacific marginal seas are due to variations in SST W and summer sea surface salinity (SSS), and thus, they are the two most important environmental factors controlling the regional diatom distribution (Huang et al, ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

East Asian Winter Monsoon Variations and Their Links to Arctic Sea Ice During the Last Millennium, Inferred From Sea Surface Temperatures in the Okinawa Trough

Jiang

et al. 2018

Paleoceanog and Paleoclimatol

Self Cite

View full text Add to dashboard Cite

The East Asian winter monsoon (EAWM) significantly impacts living conditions in a large part of Asia, and therefore, it is important to understand its major driving mechanisms. Winter sea surface temperature (SSTW) and circulation in the southern Okinawa Trough are today both primarily controlled by the EAWM. Here we present a new SSTW reconstruction for the last millennium based on a diatom record from sediment core MD05‐2908, from the continental slope of the southern Okinawa Trough off northeastern Taiwan. Our reconstruction indicates that SSTW varied between 14.1 and 19.6°C over the past 1,000 years. Changes in SSTW in the southern Okinawa Trough correspond closely to the index of warm winters based on historical documents from the East Asian monsoon domain. This implies that our SSTW record can be used to reconstruct EAWM variability during the last millennium. Comparisons with the reconstructed winter Arctic Oscillation (AO, developed from historical snow anomaly events in Eastern Asia) and Arctic sea ice cover reveal a significant positive correlation between the EAWM and AO during the time interval from 1000–1400 Common Era (C.E.), coinciding with reduced sea ice cover. However, there is no significant correlation with increased sea ice cover during the interval from 1400 to 1700 C.E. This suggests that the reduction in Arctic sea ice may periodically have played a role in strengthening the relationship between the EAWM and the AO during the last millennium and that the current and future reduction in Arctic sea ice may have significant consequences for the EAWM.

show abstract

“…Both methods are widely applied in atmospheric/ocean and palaeoclimate studies (e.g. Chang et al 2004;Sha et al 2016;Sunkara & Tiwari 2016).…”

Section: Time-frequency Analysismentioning

confidence: 99%

Climate reconstruction for the Entre‐Douro‐e‐Minho region (NW Portugal) between AD 1626 and AD 1820: synthesis of viticulture data and foraminiferal evidence

Moreno

Fatela

Gonçalves

et al. 2018

Boreas

View full text Add to dashboard Cite

This work presents two novel climate-related time series for the northwest of Portugal. The first is an AD 1626-1820 triennial-resolvedwine production series, based on the Benedictine accounts from six monasteries of the Entre-Douroe-Minho (EDM) region. The second, an AD 1654-2010 benthic foraminiferal record from the Caminha salt marsh, located in the lowerestuaryof the MinhoRiver. The serieswereanalysedtogether for the common periodto outlinehow both palaeoclimatic proxies respond to the most likely natural environmental drivers of temporal variability, solar forcing included. Singular spectral analysis revealed a common significant multidecadal periodicity agreeing with recognized long-term changes in solar activity, i.e. the Lower Gleissberg cycle (50-80 years). The application of wavelet analysis allowed the detection of high coherence at this time scale (centred at c. 64 years) between marsh foraminifera and both total solar irradiance and the North Atlantic Oscillation index. This relationship persists throughout the c. AD 1730-1875period. The continuouswavelettransform results for wine productionwereinconclusive. As the timespan analysed is recognized as one of high socio-economic and political distress, the main human-driven impacts on wine production, particularly in the two periods of greatly reduced solar activitythe Maunder and Dalton Minimaare reviewed in the light of the available historical records. In addition to a documented climate-related agricultural crisis in Portugal, damage and losses to wine production may have been triggered by several local and international conflicts in which the country was involved. But to what extent the two influences contributed to the wine production variations observed in the EDM region during both periods remains an open question.

show abstract

Solar forcing as an important trigger for West Greenland sea-ice variability over the last millennium

Cited by 33 publications

References 81 publications

Climate variability in the subarctic area for the last 2 millennia

Climate variability in the subarctic area for the last 2 millennia

East Asian Winter Monsoon Variations and Their Links to Arctic Sea Ice During the Last Millennium, Inferred From Sea Surface Temperatures in the Okinawa Trough

Climate reconstruction for the Entre‐Douro‐e‐Minho region (NW Portugal) between AD 1626 and AD 1820: synthesis of viticulture data and foraminiferal evidence

Contact Info

Product

Resources

About