Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 3.536 IF 3.536
  • IF 5-year value: 3.967 IF 5-year
    3.967
  • CiteScore value: 6.6 CiteScore
    6.6
  • SNIP value: 1.262 SNIP 1.262
  • IPP value: 3.90 IPP 3.90
  • SJR value: 2.185 SJR 2.185
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 71 Scimago H
    index 71
  • h5-index value: 40 h5-index 40
Preprints
https://doi.org/10.5194/cp-2020-8
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-2020-8
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 03 Feb 2020

Submitted as: research article | 03 Feb 2020

Review status
A revised version of this preprint was accepted for the journal CP and is expected to appear here in due course.

Dynamical and hydrological changes in climate simulations of the last millennium

Pedro José Roldán-Gómez1, Jesús Fidel González-Rouco1, Camilo Melo-Aguilar1, and Jason E. Smerdon2 Pedro José Roldán-Gómez et al.
  • 1Instituto de Geociencias, Consejo Superior de Investigaciones Científicas - Universidad Complutense de Madrid, 28040 Madrid, Spain
  • 2Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States of America

Abstract. Simulations of last millennium (LM) climate show that external forcing had a major contribution to the evolution of temperatures; warmer and colder periods like the Medieval Climate Anomaly (MCA; ca. 950–1250 CE) and the Little Ice Age (LIA; ca. 1450–1850 CE) were critically influenced by changes in solar and volcanic activity. Even if this influence is mainly observed in terms of temperatures, evidence from simulations and reconstructions show that other variables related to atmospheric dynamics and hydroclimate also were influenced by external forcing over some regions. In this work, simulations from the Coupled Model Intercomparison Project Phase 5/Paleoclimate Modelling Intercomparison Project Phase 3 (CMIP5/PMIP3) are analyzed to explore the influence of external forcings on the dynamical and hydrological changes during the LM at different spatial and temporal scales. Principal Component (PC) analysis is used to obtain the modes of variability governing the global evolution of climate and to assess their correlation with the total external forcing at multidecadal to multicentennial timescales. For shorter timescales, a composite analysis is used to address the response to specific events of external forcing like volcanic eruptions. The results show coordinated long-term changes in global circulation patterns, which suggest expansions and contractions of the Hadley Cells and latitudinal displacements of Westerlies in response to external forcing. For hydroclimate, spatial patterns of drier and wetter conditions in areas influenced by the North Atlantic Oscillation (NAO), Northern Annular Mode (NAM) and Southern Annular Mode (SAM) and alterations in the intensity and distribution of monsoons and convergence zones are consistently found. Similarly, a clear short-term response is found in the years following volcanic eruptions. Although external forcing has a larger influence on temperatures, the results suggest that dynamical and hydrological variations over the LM exhibit a direct response to external forcing both at long and short timescales that is highly dependent on the particular simulation and model.

Pedro José Roldán-Gómez et al.

Pedro José Roldán-Gómez et al.

Pedro José Roldán-Gómez et al.

Viewed

Total article views: 381 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
298 75 8 381 9 6
  • HTML: 298
  • PDF: 75
  • XML: 8
  • Total: 381
  • BibTeX: 9
  • EndNote: 6
Views and downloads (calculated since 03 Feb 2020)
Cumulative views and downloads (calculated since 03 Feb 2020)

Viewed (geographical distribution)

Total article views: 302 (including HTML, PDF, and XML) Thereof 302 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 09 Jul 2020
Publications Copernicus
Download
Short summary
This work analyses the behavior of atmospheric dynamics and hydroclimate in climate simulations of the last millennium. In particular, it is assessed how external forcing factors, like solar and volcanic activity and greenhouse gases emissions, impact on variables like temperature, pressure, wind, precipitation and soil moisture. The results of these analyses show that changes in the forcing could alter the zonal circulation and the intensity and distribution of monsoons and convergence zones.
This work analyses the behavior of atmospheric dynamics and hydroclimate in climate simulations...
Citation