Environmetrics
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Bias correction in estimation of public health risk attributable to short‐term air pollution exposure
Environmetrics - Tập 26 Số 4 - Trang 298-311 - 2015
Numerous epidemiologic studies have reported associations between short‐term air
pollution exposure and mortality. Such short‐term risk models include smooth
functions of time to control for unmeasured confounding variables. We
demonstrate bias in these short‐term Generalized Additive Model estimates
because of lack of accounting for long timescale variations and propose a family
of improved time ...
Spatiotemporal models in the estimation of area precipitation
Environmetrics - Tập 16 Số 8 - Trang 773-802 - 2005
AbstractSince area precipitation measurements are difficult to obtain because of
the large spatial and time variability of the precipitation field, the
development of statistical methods for the optimal combination of weather radar
and rain gauge measurements is a matter of great importance. This work presents
area rainfall prediction methods based on kriging and cokriging techniques
modified to a...
Classification and calibration of organic matter fluorescence data with multiway analysis methods and artificial neural networks: an operational tool for improved drinking water treatment
Environmetrics - Tập 22 Số 3 - Trang 256-270 - 2011
Multivariate quantiles in hydrological frequency analysis
Environmetrics - Tập 22 Số 1 - Trang 63-78 - 2011
Comparative spatiotemporal analysis of fine particulate matter pollution
Environmetrics - Tập 21 Số 3-4 - Trang 305-317 - 2010
AbstractThe prime focus of this work is the comparative investigation,
theoretical and numerical, of spatiotemporal techniques used in air pollution
studies. Space‐time statistics techniques are classified on the basis of a set
of criteria and the relative theoretical merits of each technique are discussed
accordingly. The numerical comparison involves the applications of two
representative techni...
Non‐parametric trend test of baltic sea data
Environmetrics - Tập 2 Số 3 - Trang 263-278 - 1991
AbstractThe recently reported tendencies toward decreasing total amounts of
silicate in the Baltic Sea are investigated by use of non‐parametric trend
analysis. The period 1968‐1986 showed significant falling trends in surface
waters from the whole system. The deepest parts of the Baltic proper did in
contrast reveal strong increasing trends. These trends are more pronounced
during the latter part...
Categorical structured additive regression for assessing habitat suitability in the spatial distribution of mussel seed abundance
Environmetrics - Tập 23 Số 1 - Trang 75-84 - 2012
Categorical regression models enable the investigation of regression
relationships between a polytomous response and a set of regressor variables.
Depending on whether the categories are ordered or nominal, special categorical
models such as cumulative and multinomial models have been proposed in the
statistical literature. In this paper, we compare various categorical structured
additive regressi...
The role of statisticians in international science policy
Environmetrics - Tập 22 Số 7 - Trang 817-825 - 2011
There are precious few statisticians involved in science policy, either
nationally or internationally. In this paper I will, in an unusually personal
way for a scientific journal, describe some of the possibilities for policy work
and the potential impact such work can have. An example is the Intergovernmental
Panel on Climate Change. I will also discuss ways that organizations,
individuals, and t...
Spatial covariance modelling in a complex coastal domain by multidimensional scaling
Environmetrics - Tập 14 Số 3 - Trang 307-321 - 2003
AbstractIn aquatic studies, spatial interactions may be both easier to interpret
and to quantify by using water distance than by using geographic distance. The
water distance is the shortest path between those two sites that may be
traversed entirely over water. One problem is that water distances may be
non‐Euclidean, and thus covariance and variogram functions are not necessarily
valid when usin...
Landscape‐based geostatistics: a case study of the distribution of blue crab in Chesapeake Bay
Environmetrics - Tập 17 Số 6 - Trang 605-621 - 2006
AbstractGeostatistical techniques have gained widespread use in ecology and
environmental science. Variograms are commonly used to describe and examine
spatial autocorrelation, and kriging has become the method of choice for
interpolating spatially‐autocorrelated variables. To date, most applications of
geostatistics have defined the separation between sample points using simple
Euclidean distance...
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