Nighttime observation and chemistry of HOx in the Pearl River Delta and Beijing in summer 2006 Atmospheric Chemistry and Physics DOI 10.5194/acp-14-4979-2014 21 May 2014 Nighttime HOx chemistry was investigated in two ground-based field campaigns (PRIDE-PRD2006 and CAREBEIJING2006) in summer 2006 in China by comparison of measured and modeled concentration data of OH and HO2. Read more
Magnetic signature of large exhumed mantle domains of the Southwest Indian Ridge – results from a deep-tow geophysical survey over 0 to 11 Ma old seafloor Solid Earth DOI 10.5194/se-5-339-2014 19 May 2014 We investigate the magnetic signature of ultramafic seafloor in the eastern part of the Southwest Indian Ridge (SWIR). There, detachment faulting, continuous over 11 Myr, exhumed large areas of mantle-derived rocks. Read more
A tropical West Pacific OH minimum and implications for stratospheric composition Atmospheric Chemistry and Physics DOI 10.5194/acp-14-4827-2014 15 May 2014 Most of the short-lived biogenic and anthropogenic chemical species that are emitted into the atmosphere break down efficiently by reaction with OH and do not reach the stratosphere. Here we show the existence of a pronounced minimum in the tropospheric column of ozone over the West Pacific, the main source region for stratospheric air, and suggest a corresponding minimum of the tropospheric column of OH. Read more
Adapting to life: ocean biogeochemical modelling and adaptive remeshing Ocean Science DOI 10.5194/os-10-323-2014 9 May 2014 We present a novel method of simulating ocean biogeochemical behaviour on a vertically adaptive computational mesh, where the mesh changes in response to the biogeochemical and physical state of the system throughout the simulation. Read more
A general framework for understanding the response of the water cycle to global warming over land and ocean Hydrology and Earth System Sciences DOI 10.5194/hess-18-1575-2014 6 May 2014 In an attempt to develop a simple framework for local-scale analysis we found that the climate model output shows a remarkably close relation to the long-standing Budyko framework of catchment hydrology. Read more
Modelling environmental influences on calving at Helheim Glacier in eastern Greenland The Cryosphere DOI 10.5194/tc-8-827-2014 6 May 2014 Calving is an important mass-loss process for many glaciers worldwide, and has been assumed to respond to a variety of environmental influences. We present a grounded, flowline tidewater glacier model using a physically-based calving mechanism, applied to Helheim Glacier, eastern Greenland. Read more
Effects of stratospheric ozone recovery on photochemistry and ozone air quality in the troposphere Atmospheric Chemistry and Physics DOI 10.5194/acp-14-4079-2014 23 April 2014 In this study, the authors examine the implications of stratospheric ozone recovery for the tropospheric chemistry and ozone air quality with a global chemical transport model (GEOS-Chem). Read more
Little Ice Age climate reconstruction from ensemble reanalysis of Alpine glacier fluctuations The Cryosphere DOI 10.5194/tc-8-639-2014 14 April 2014 Here the author analyses terminus position histories from an ensemble of seven glaciers in the Alps with a macroscopic model of glacier dynamics to derive a history of glacier equilibrium line altitude for the time span 400–2010 C.E. Read more
Earthquake-induced ground failures in Italy from a reviewed database Natural Hazards and Earth System Sciences DOI 10.5194/nhess-14-799-2014 10 April 2014 A database of earthquake-induced ground failures in Italy is presented, and the related content is analysed. The catalogue collects data regarding landslides, liquefaction, ground cracks, surface faulting and ground changes triggered by earthquakes of Mercalli epicentral intensity 8 or greater that occurred in the last millennium in Italy. Read more
Fracture-induced softening for large-scale ice dynamics The Cryosphere DOI 10.5194/tc-8-587-2014 8 April 2014 To account for the macroscopic effect of fracture processes on large-scale viscous ice dynamics (i.e., ice-shelf scale), the authors apply a continuum representation of fractures and related fracture growth into the prognostic Parallel Ice Sheet Model and compare the results to observations. Read more
Regional and inter-regional effects in evolving climate networks Nonlinear Processes in Geophysics DOI 10.5194/npg-21-451-2014 1 April 2014 In this study we identify the sources of the evolving network characteristics by considering a reduced-dimensionality description of the climate system using network nodes given by rotated principal component analysis. The time evolution of structures in local intra-component networks is studied and compared to evolving inter-component connectivity. Read more
Modelling global-scale climate impacts of the late Miocene Messinian Salinity Crisis Climate of the Past DOI 10.5194/cp-10-607-2014 25 March 2014 By running extreme, sensitivity-type experiments with a fully coupled ocean–atmosphere general circulation model, this paper investigates the potential of various Messinian Salinity Crisis Mediterranean Outflow Water scenarios to impact global-scale climate. Read more
Further evidence of important environmental information content in red-to-green ratios as depicted in paintings by great masters Atmospheric Chemistry and Physics DOI 10.5194/acp-14-2987-2014 25 March 2014 In this paper, the authors examine sunsets painted by famous artists as proxy information for the aerosol optical depth after major volcanic eruptions. Read more
Characterization of submicron aerosols during a month of serious pollution in Beijing, 2013 Atmospheric Chemistry and Physics DOI 10.5194/acp-14-2887-2014 20 March 2014 In January 2013, Beijing experienced several serious haze events. To achieve a better understanding of the characteristics, sources and processes of aerosols during this month, an Aerodyne high-resolution time-of-flight aerosol mass spectrometer was deployed at an urban site between 1 January and 1 February 2013 to obtain the size-resolved chemical composition of non-refractory submicron particles. Read more
Uncertainty analysis of projections of ozone-depleting substances: mixing ratios, EESC, ODPs, and GWPs Atmospheric Chemistry and Physics DOI 10.5194/acp-14-2757-2014 17 March 2014 Here the authors present a comprehensive uncertainty analysis of future mixing ratios of ozone-depleting substances (ODPs), levels of equivalent effective stratospheric chlorine (EESC), ozone depletion potentials, and global warming potentials (GWPs). Read more
The challenge of simulating the warmth of the mid-Miocene climatic optimum in CESM1 Climate of the Past DOI 10.5194/cp-10-523-2014 13 March 2014 In this paper, the authors use the recently released Community Earth System Model (CESM1.0) with a slab ocean to simulate the mid-Miocene climatic optimum, incorporating recent Miocene CO2 reconstructions of 400 ppm (parts per million). Read more
Subsurface pH and carbonate saturation state of aragonite on the Chinese side of the North Yellow Sea: seasonal variations and controls Biogeosciences DOI 10.5194/bg-11-1103-2014 26 February 2014 Based upon eight field surveys conducted between May 2011 and May 2012, we investigated seasonal variations in pH, carbonate saturation state of aragonite, and ancillary data on the Chinese side of the North Yellow Sea. Read more
Exploring local adaptation and the ocean acidification seascape – studies in the California Current Large Marine Ecosystem Biogeosciences DOI 10.5194/bg-11-1053-2014 24 February 2014 Here we present the OMEGAS strategy of co-locating sensors and oceanographic observations with biological studies on benthic marine invertebrates, specifically measurements of functional traits such as calcification-related processes and genetic variation in populations that are locally adapted to conditions in a particular region of the coast. Read more
Incidence of rough and irregular atmospheric ice particles from Small Ice Detector 3 measurements Atmospheric Chemistry and Physics DOI 10.5194/acp-14-1649-2014 12 February 2014 2D light-scattering patterns were obtained in situ for the first time using the Small Ice Detector 3 probe during several flights in a variety of mid-latitude mixed-phase and cirrus clouds. Read more
Observed decline of the Atlantic meridional overturning circulation 2004–2012 Ocean Science DOI 10.5194/os-10-29-2014 6 February 2014 The Atlantic meridional overturning circulation and its component parts are monitored by combining a transatlantic array of moored instruments with submarine-cable-based measurements of the Gulf Stream and satellite derived Ekman transport. The time series has recently been extended to October 2012 and the results show a downward trend since 2004. Read more