Ian Simmonds | University of Melbourne (original) (raw)

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Papers by Ian Simmonds

Research paper thumbnail of The Spectral Representation of Moisture

Journal of Applied Meteorology, 1975

Research paper thumbnail of On Interpolation and Evaluation of Derivatives from a Finite Number of Equally-Spaced Data Points

Journal of Applied Meteorology, 1975

Research paper thumbnail of Spectral Representation of Horizontal Wind in Numerical Models of the Atmosphere

Journal of Applied Meteorology, 1974

Research paper thumbnail of Regional and large-scale influences on Antarctic Peninsula climate

Antarctic Research Series, 2003

The geography and latitude of the Antarctic Peninsula (AP) differ signi???cantly from those of mo... more The geography and latitude of the Antarctic Peninsula (AP) differ signi???cantly from those of most of Antarctica, and hence it is not surprising that its weather and climate exhibit special characteristics. We present here modern aspects of the cli-mate of the AP derived from a ...

Research paper thumbnail of Calculating CO2 fluxes by data assimilation coupled to a three dimensional mass balance inversion

Geophysical Monograph Series, 2000

ABSTRACT

Research paper thumbnail of A methodology of tracking transitioning Cyclones

IOP Conference Series: Earth and Environmental Science, 2010

... Insert chart highlights the performance for each environmental point sample test for the 500h... more ... Insert chart highlights the performance for each environmental point sample test for the 500hPa level (2001 Australian Duck case study ... gov.au/events/9icshmo/ last checked in June 2010 [13] Berrisford P, Dee D, Fielding K, Fuentes M, Kallberg P, Kobayshi S and Uppala S 2009 ...

Research paper thumbnail of The Role of Extratropical Cyclones and Fronts for Southern Ocean Freshwater Fluxes

Research paper thumbnail of Variability and Trends of Global Atmospheric Frontal Activity and Links with Large-Scale Modes of Variability

Research paper thumbnail of The sensitivity of characteristics of cyclone activity to identification procedures in tracking algorithms

Research paper thumbnail of A comparison of tracking methods for extreme cyclones in the Arctic basin

Research paper thumbnail of The effect of the prescription of zonally-uniform sea surface temperatures in a general circulation model

Journal of Climatology, 1986

Abstract To assess the impact on the global atmospheric circulation of zonally-varying sea surfac... more Abstract To assess the impact on the global atmospheric circulation of zonally-varying sea surface temperature (SST), a general circulation model experiment has been run in which this variation has been removed for a January climate simulation. This results in an ...

Research paper thumbnail of What are the physical links between Arctic sea ice loss and Eurasian winter climate?

Environmental Research Letters, 2014

ABSTRACT Rapid sea ice retreat and increases in temperature have characterised the Arctic basin i... more ABSTRACT Rapid sea ice retreat and increases in temperature have characterised the Arctic basin in the last few decades. A number of studies have suggested that these changes have had a direct impact on extremes of weather and climate in the midlatitudes, while others have submitted that the evidence for this may not be robust. Sato et al (2014 Environ. Res. Lett. 9 084009) cast considerable light on this divergence of perspectives by revealing that apparent links between Barents Sea ice coverage and cold Eurasian winters form just a sector of a teleconnection pattern which originates remotely in the North Atlantic Gulf Stream region.

Research paper thumbnail of On the Dynamics of Mediterranean Explosive Cyclogenesis

Springer Atmospheric Sciences, 2012

Research paper thumbnail of Seasonal Aspects of an Objective Climatology of Anticyclones Affecting the Mediterranean

Journal of Climate, 2014

ABSTRACT An objective climatology of anticyclones over the greater Mediterranean region is presen... more ABSTRACT An objective climatology of anticyclones over the greater Mediterranean region is presented based on the Interim ECMWF Re-Analysis (ERA-Interim) for a 34-yr period (1979-2012) and the Melbourne University automatic identification and tracking algorithm. The scheme's robustness and reliability for the transient extratropical propagation of anticyclones, with the appropriate choices of parameter settings, has been established and the results obtained here present new research perspectives on anticyclonic activity affecting the Mediterranean. Properties of Mediterranean anticyclones, such as frequency, generation and dissipation, movement, scale, and depth are investigated. The highest frequency of anticyclones is found over continental areas, while the highest maritime frequency occurs over closed basins exhibiting also maxima of anticyclogenesis. There is a significant seasonality in system density and anticyclogenesis maxima, this being associated with the seasonal variations of the larger-scale atmospheric circulation that affect the greater Mediterranean region.

Research paper thumbnail of On the dynamics of a case study of explosive cyclogenesis in the Mediterranean

Meteorology and Atmospheric Physics, 2014

Research paper thumbnail of Multi-deca~ al clitnate variability in the Antarctic region and global change

Research paper thumbnail of 4.5 MODELLING AND INTERPRETATION OF OXYGEN ISOTOPE RECORDS OF TROPICAL CLIMATE VARIABILITY

Information about past tropical climate variability is recorded in oxygen isotope ratios in coral... more Information about past tropical climate variability is recorded in oxygen isotope ratios in coral and foraminiferal carbonate as well as tropical ice cores. The interpretation of isotopic climate records requires assumptions about the application of present day isotope-climate ...

Research paper thumbnail of 19.12 DECADAL CLIMATE VARIABILITY IN THE PACIFIC OCEAN

Research paper thumbnail of AMIP II Diagnostic Subproject No. 3: Statistics of Transient Circulation Systems

Background The study of the cyclone/anticyclone frequencies has a long history. Study of these fe... more Background The study of the cyclone/anticyclone frequencies has a long history. Study of these features has always been considered a fundamental element of mid-latitude meteorology. Proper simulation of the location and intensity of these features play a critical ...

Research paper thumbnail of 19.13 CHANGES TO THE VERTICAL STRUCTURE OF CYCLONES UNDER GLOBAL WARMING

Research paper thumbnail of The Spectral Representation of Moisture

Journal of Applied Meteorology, 1975

Research paper thumbnail of On Interpolation and Evaluation of Derivatives from a Finite Number of Equally-Spaced Data Points

Journal of Applied Meteorology, 1975

Research paper thumbnail of Spectral Representation of Horizontal Wind in Numerical Models of the Atmosphere

Journal of Applied Meteorology, 1974

Research paper thumbnail of Regional and large-scale influences on Antarctic Peninsula climate

Antarctic Research Series, 2003

The geography and latitude of the Antarctic Peninsula (AP) differ signi???cantly from those of mo... more The geography and latitude of the Antarctic Peninsula (AP) differ signi???cantly from those of most of Antarctica, and hence it is not surprising that its weather and climate exhibit special characteristics. We present here modern aspects of the cli-mate of the AP derived from a ...

Research paper thumbnail of Calculating CO2 fluxes by data assimilation coupled to a three dimensional mass balance inversion

Geophysical Monograph Series, 2000

ABSTRACT

Research paper thumbnail of A methodology of tracking transitioning Cyclones

IOP Conference Series: Earth and Environmental Science, 2010

... Insert chart highlights the performance for each environmental point sample test for the 500h... more ... Insert chart highlights the performance for each environmental point sample test for the 500hPa level (2001 Australian Duck case study ... gov.au/events/9icshmo/ last checked in June 2010 [13] Berrisford P, Dee D, Fielding K, Fuentes M, Kallberg P, Kobayshi S and Uppala S 2009 ...

Research paper thumbnail of The Role of Extratropical Cyclones and Fronts for Southern Ocean Freshwater Fluxes

Research paper thumbnail of Variability and Trends of Global Atmospheric Frontal Activity and Links with Large-Scale Modes of Variability

Research paper thumbnail of The sensitivity of characteristics of cyclone activity to identification procedures in tracking algorithms

Research paper thumbnail of A comparison of tracking methods for extreme cyclones in the Arctic basin

Research paper thumbnail of The effect of the prescription of zonally-uniform sea surface temperatures in a general circulation model

Journal of Climatology, 1986

Abstract To assess the impact on the global atmospheric circulation of zonally-varying sea surfac... more Abstract To assess the impact on the global atmospheric circulation of zonally-varying sea surface temperature (SST), a general circulation model experiment has been run in which this variation has been removed for a January climate simulation. This results in an ...

Research paper thumbnail of What are the physical links between Arctic sea ice loss and Eurasian winter climate?

Environmental Research Letters, 2014

ABSTRACT Rapid sea ice retreat and increases in temperature have characterised the Arctic basin i... more ABSTRACT Rapid sea ice retreat and increases in temperature have characterised the Arctic basin in the last few decades. A number of studies have suggested that these changes have had a direct impact on extremes of weather and climate in the midlatitudes, while others have submitted that the evidence for this may not be robust. Sato et al (2014 Environ. Res. Lett. 9 084009) cast considerable light on this divergence of perspectives by revealing that apparent links between Barents Sea ice coverage and cold Eurasian winters form just a sector of a teleconnection pattern which originates remotely in the North Atlantic Gulf Stream region.

Research paper thumbnail of On the Dynamics of Mediterranean Explosive Cyclogenesis

Springer Atmospheric Sciences, 2012

Research paper thumbnail of Seasonal Aspects of an Objective Climatology of Anticyclones Affecting the Mediterranean

Journal of Climate, 2014

ABSTRACT An objective climatology of anticyclones over the greater Mediterranean region is presen... more ABSTRACT An objective climatology of anticyclones over the greater Mediterranean region is presented based on the Interim ECMWF Re-Analysis (ERA-Interim) for a 34-yr period (1979-2012) and the Melbourne University automatic identification and tracking algorithm. The scheme's robustness and reliability for the transient extratropical propagation of anticyclones, with the appropriate choices of parameter settings, has been established and the results obtained here present new research perspectives on anticyclonic activity affecting the Mediterranean. Properties of Mediterranean anticyclones, such as frequency, generation and dissipation, movement, scale, and depth are investigated. The highest frequency of anticyclones is found over continental areas, while the highest maritime frequency occurs over closed basins exhibiting also maxima of anticyclogenesis. There is a significant seasonality in system density and anticyclogenesis maxima, this being associated with the seasonal variations of the larger-scale atmospheric circulation that affect the greater Mediterranean region.

Research paper thumbnail of On the dynamics of a case study of explosive cyclogenesis in the Mediterranean

Meteorology and Atmospheric Physics, 2014

Research paper thumbnail of Multi-deca~ al clitnate variability in the Antarctic region and global change

Research paper thumbnail of 4.5 MODELLING AND INTERPRETATION OF OXYGEN ISOTOPE RECORDS OF TROPICAL CLIMATE VARIABILITY

Information about past tropical climate variability is recorded in oxygen isotope ratios in coral... more Information about past tropical climate variability is recorded in oxygen isotope ratios in coral and foraminiferal carbonate as well as tropical ice cores. The interpretation of isotopic climate records requires assumptions about the application of present day isotope-climate ...

Research paper thumbnail of 19.12 DECADAL CLIMATE VARIABILITY IN THE PACIFIC OCEAN

Research paper thumbnail of AMIP II Diagnostic Subproject No. 3: Statistics of Transient Circulation Systems

Background The study of the cyclone/anticyclone frequencies has a long history. Study of these fe... more Background The study of the cyclone/anticyclone frequencies has a long history. Study of these features has always been considered a fundamental element of mid-latitude meteorology. Proper simulation of the location and intensity of these features play a critical ...

Research paper thumbnail of 19.13 CHANGES TO THE VERTICAL STRUCTURE OF CYCLONES UNDER GLOBAL WARMING

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