Optimal ranking regime analysis of TreeFlow dendrohydrological reconstructions
Summary: A new approach to time series analysis - the ORR method - was used to evaluate reconstructed western US streamflow records during 1500-2007. This method shows an interesting pattern of alternating drought and wet periods during the late 16th and 17th centuries, a period with relatively few drought or wet periods during the 18th century, and the and the reappearance of alternating dry and wet periods during the 19th and early 20th centuries.
Clim. Past, 11, 1107-1125, doi:10.5194/cp-11-1107-2015, 2015
Comment on "Radiative forcings for 28 potential Archean greenhouse gases" by Byrne and Goldblatt (2014)
Summary: In the article Clim Past 10, 1779 (2014), the HITRAN2012 database was employed to evaluate the radiative forcing of 28 Archean gases. The authors claimed that for NO2, H2O2, C2H4, CH3OH, and CH3Br there are severe disagreements between cross sections generated from the HITRAN line-by-line data and those of the PNNL experimental database. In this work we show that the differences are not nearly at the scale suggested by the authors, and their conclusions about these gases and HO2 are not correct.
Clim. Past, 11, 1097-1105, doi:10.5194/cp-11-1097-2015, 2015
A regional climate palaeosimulation for Europe in the period 1500–1990 – Part 2: Shortcomings and strengths of models and reconstructions
Clim. Past, 11, 1077-1095, doi:10.5194/cp-11-1077-2015, 2015
Multiscale monsoon variability during the last two climatic cycles revealed by spectral signals in Chinese loess and speleothem records
Summary: Multiscale signals were decomposed from Chinese loess and speleothem records over the last 260 kyr. We found great glacial and orbital impacts on the loess grain size changes and dominant precession forcing in the speleothem δ18O variability. The millennial components are evident in the loess and speleothem proxies with variances of 13 and 17%. Close matches of millennial monsoon events between these two proxies indicate similar driving force linked to high-latitude Northern Hemisphere climate.
Clim. Past, 11, 1067-1075, doi:10.5194/cp-11-1067-2015, 2015
Endless cold: a seasonal reconstruction of temperature and precipitation in the Burgundian Low Countries during the 15th century based on documentary evidence
Summary: This paper applies the methods of historical climatology to present a climate reconstruction for the area of the Burgundian Low Countries during the 15th century. The results are based on documentary evidence. Approximately 3000 written records derived from about 100 different sources were examined and converted into seasonal seven-degree indices of temperature and precipitation.
Clim. Past, 11, 1049-1066, doi:10.5194/cp-11-1049-2015, 2015
A collection of sub-daily pressure and temperature observations for the early instrumental period with a focus on the "year without a summer" 1816
Summary: A data set of instrumental pressure and temperature observations for the early instrumental period (before ca. 1850) is described. This is the result of a digitisation effort involving the period immediately after the eruption of Mount Tambora in 1815, combined with the collection of already available sub-daily time series. The highest data availability is therefore for the years 1815 to 1817. An analysis of pressure variability and of case studies in Europe is performed for that period.
Clim. Past, 11, 1027-1047, doi:10.5194/cp-11-1027-2015, 2015
The Paleocene–Eocene Thermal Maximum at DSDP Site 277, Campbell Plateau, southern Pacific Ocean
Summary: Re-examination of a Deep Sea Drilling Project sediment core (DSDP Site 277) from the western Campbell Plateau has identified the initial phase of the Paleocene-Eocene Thermal Maximum (PETM) within nannofossil chalk, the first record of the PETM in an oceanic setting in the southern Pacific Ocean (paleolatitude of ~65°S). Geochemical proxies indicate that intermediate and surface waters warmed by ~6° at the onset of the PETM prior to the full development of the negative δ13C excursion.
Clim. Past, 11, 1009-1025, doi:10.5194/cp-11-1009-2015, 2015
Scaling laws for perturbations in the ocean–atmosphere system following large CO2 emissions
Summary: In this paper we find scaling relationships for perturbations to atmosphere and ocean variables from large transient CO2 emissions. We use a carbon cycle box model to calculate peak perturbations to a variety of ocean and atmosphere variables resulting from idealized emission events. As these scaling relationships depend on the physical setup, they represent a compact way of characterizing how different climates respond to large transient perturbations.
Clim. Past, 11, 991-1007, doi:10.5194/cp-11-991-2015, 2015
A GCM comparison of Pleistocene super-interglacial periods in relation to Lake El'gygytgyn, NE Arctic Russia
Summary: Evidence from Pleistocene sediments suggest that the Arctic's climate went through multiple sudden transitions, warming by 2-4 °C (compared to preindustrial times), and stayed warm for hundreds to thousands of years. A climate modelling study of these events suggests that the Arctic's climate and landscape drastically changed, transforming a cold and barren landscape as we know today to a warm, lush, evergreen and boreal forest landscape only seen in the modern midlatitudes.
Clim. Past, 11, 979-989, doi:10.5194/cp-11-979-2015, 2015
Implementation of counted layers for coherent ice core chronology
Clim. Past, 11, 959-978, doi:10.5194/cp-11-959-2015, 2015
Reconciling reconstructed and simulated features of the winter Pacific/North American pattern in the early 19th century
Summary: A discrepancy exists between reconstructed and simulated Pacific North American pattern (PNA) features during the early 19th century. Pseudo-reconstructions demonstrate that the available PNA reconstruction is potentially skillful but also potentially affected by a number of sources of uncertainty and deficiencies especially at multidecadal and centennial timescales. Simulations and reconstructions can be reconciled by attributing the reconstructed PNA features to internal variability.
Clim. Past, 11, 939-958, doi:10.5194/cp-11-939-2015, 2015
A tropical speleothem record of glacial inception, the South American Summer Monsoon from 125 to 115 ka
Clim. Past, 11, 931-938, doi:10.5194/cp-11-931-2015, 2015
Thermal evolution of the western South Atlantic and the adjacent continent during Termination 1
Summary: Here we show that temperatures in the western South Atlantic increased markedly during the major slowdown event of the Atlantic meridional overturning circulation (AMOC) of the last deglaciation. Over the adjacent continent, however, temperatures followed the rise in atmospheric carbon dioxide, lagging changes in oceanic temperature. Our records corroborate the notion that the long duration of the major slowdown event of the AMOC was fundamental in driving the Earth out of the last glacial.
Clim. Past, 11, 915-929, doi:10.5194/cp-11-915-2015, 2015
Technical Note: How accurate can stalagmite formation temperatures be determined using vapour bubble radius measurements in fluid inclusions?
Summary: Fluid inclusions inside stalagmites retain information on the cave temperature at the time they formed and thus can be used to reconstruct the continental climate of the past. A method for extracting this information based on a thermodynamic model and size measurements of femtosecond-laser-induced vapour bubbles is presented. Applying our method to stalagmites taken from the Milandre cave in the Swiss Jura Mountains demonstrate that palaeotemperatures can be determined with an accuracy of ±1°C.
Clim. Past, 11, 905-913, doi:10.5194/cp-11-905-2015, 2015
Twelve thousand years of dust: the Holocene global dust cycle constrained by natural archives
Summary: We propose an innovative framework to organize paleodust records, formalized in a publicly accessible database, and discuss the emerging properties of the global dust cycle during the Holocene by integrating our analysis with simulations performed with the Community Earth System Model. We show how the size distribution of dust is intrinsically related to the dust mass accumulation rates and that only considering a consistent size range allows for a consistent analysis of the global dust cycle.
Clim. Past, 11, 869-903, doi:10.5194/cp-11-869-2015, 2015
Eastern Mediterranean Sea circulation inferred from the conditions of S1 sapropel deposition
Clim. Past, 11, 855-867, doi:10.5194/cp-11-855-2015, 2015
Effects of past climate variability on fire and vegetation in the cerrãdo savanna of the Huanchaca Mesetta, NE Bolivia
Summary: A 14,500-year, high-resolution, sedimentary record from Huanchaca Mesetta, a palm swamp located in the cerrãdo savanna in northeastern Bolivia, was analyzed for phytoliths, stable isotopes and charcoal. A non-analogue, cold-adapted vegetation community dominated the Late Glacial-Early Holocene period (14.5-9ka), which included trees and C3 Pooideae and C4 Panicoideae grasses. The Late Glacial vegetation was fire sensitive and fire activity during this period was low, likely responding to fuel av
Clim. Past, 11, 835-853, doi:10.5194/cp-11-835-2015, 2015
New insights into the reconstructed temperature in Portugal over the last 400 years
Clim. Past, 11, 825-834, doi:10.5194/cp-11-825-2015, 2015
Bottom water variability in the subtropical northwestern Pacific from 26 kyr BP to present based on Mg / Ca and stable carbon and oxygen isotopes of benthic foraminifera
Clim. Past, 11, 803-824, doi:10.5194/cp-11-803-2015, 2015
A 500-year seasonally resolved δ18O and δ13C, layer thickness and calcite aspect record from a speleothem deposited in the Han-sur-Lesse cave, Belgium
Clim. Past, 11, 789-802, doi:10.5194/cp-11-789-2015, 2015