Polar plotting of seasonal hydrologic and climatic data (original) (raw)
Related papers
A methodology for investigation of the seasonal evolution in proglacial hydrograph form
Hydrological Processes, 1999
This paper advances an objective method of diurnal hydrograph classi®cation as an aid to exploring changes in the hydrological functioning of glacierized catchments over the ablation season. The temporal sequencing of dierent hydrograph classes allows identi®cation of seasonal evolution in hydrograph form and also assists delimitation of hydrologically-meaningful time periods of similar diurnal discharge response. The eectiveness of this approach is illustrated by applying it to two contrasting summer discharge records for a small cirque basin. By comparing the results with patterns of surface energy receipt and glacier ablation, the seasonally transient relative in¯uences of: (i) surface meltwater production and (ii) meltwater routing and storage conditions within the intervening glacier drainage system in determining runo are elucidated. The method successfully characterizes distinct seasonal-scale changes in the diurnal out¯ow hydrograph during the ablation-dominated 1995 melt season but is also able to reveal underlying trends and short-term¯uctuations in the precipitation-dominated, poorly ablation-regulated 1996 melt season. The limitations and bene®ts of this hydrograph classi®cation technique are evaluated.
Remote Sensing of Environment, 2001
The patterns of seasonal variation of surface plant pigment concentration (Chl) in the Newfoundland Region were studied using the remotely sensed data from CZCS (1978CZCS ( -1986 and SeaWiFS radiometers (from September 1997 to October 1999. Sea Surface Temperature (SST) data obtained from AVHRR radiometers and Sea Surface Height (SSH) data obtained from TOPEX/POSEIDON altimeter were used then to interprete the observed patterns in terms of physical factors which influence the growth of phytoplankton . Stable seasonal cycles of both SST and Chl were observed in all parts of the region under study (Labrador Current, Newfoundland Bank, Flemish Pass, frontal zone between Gulf Stream and Labrador Current).
Journal of Hydrology, 2003
We are in agreement with Burn and Hag Elnur [J. Hydrol. 255 (2002) 107] that streamflow trends and variability are related to meteorological factors. We expanded the analysis of streamflow variability by relating annual peaks and spring (April, May, June) discharges to ENSO (El Niño-Southern Oscillation) events. Since geophysical considerations suggest that western Canada is warmer and drier than usual during El Niño but cooler and wetter under La Nina influences, flow variability of many western Canadian rivers is found to be correlated with winter values of such indices as the Southern Oscillation Index (SOI), Multivariate ENSO Index (MEI) or PNA (Pacific/North American Index). The spatial pattern of the non-parametric Spearman's r 2 (for streamflow vs SOI) indicates a general correspondence with the correlation pattern of SOI-precipitation reported by Shabbar et al. [J. Climate 10 (1997) 3016]. This reinforces the linkage between streamflow variability, precipitation and climatic forcing.
IPCC SROCC Chapter 3: Polar Regions
2019
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Seasonal statistics: The ‘seas’ package for R
Computers & Geosciences, 2007
Suggests MASS Description Capable of deriving seasonal statistics, such as``normals'', and analysis of seasonal data, such as departures. This package also has graphics capabilities for representing seasonal data, including boxplots for seasonal parameters, and bars for summed normals. There are many specific functions related to climatology, including precipitation normals, temperature normals, cumulative precipitation departures and precipitation interarrivals. However, this package is designed to represent any time-varying parameter with a discernible seasonal signal, such as found in hydrology and ecology.