Anna Kłos
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View article: Impact of alignment strategy to the reference frame on the 3D annual station motions from different GNSS solutions
Impact of alignment strategy to the reference frame on the 3D annual station motions from different GNSS solutions Open
A comparison of the three-dimensional annual motions of the global Navigation satellite system (GNSS) stations in two different solutions – the latest reprocessing campaign of the International GNSS Service (IGS), and the station position …
View article: Comment on essd-2025-223
Comment on essd-2025-223 Open
View article: Nonlinearity in the trend of GRACE time series: improving understanding of global total water storage changes over two decades
Nonlinearity in the trend of GRACE time series: improving understanding of global total water storage changes over two decades Open
The Gravity Recovery and Climate Experiment (GRACE) mission and its successor, the GRACE Follow-On mission, have been continuously observing changes in Total Water Storage (TWS) since 2002. These global, monthly, two-decade changes are con…
View article: Denoising and deconvolving CT images of unknown origin: comparing linear Wiener-deconvolution with deep convolutional neural network Noise2Inverse
Denoising and deconvolving CT images of unknown origin: comparing linear Wiener-deconvolution with deep convolutional neural network Noise2Inverse Open
Low-dose CT scans are very fast, but they feature strong pixel noise which, in turn, invites for efficient denoising the same way that strong image blur invites for sharpening the images. Wiener-deconvolution serves as a starting point, co…
View article: On the ability to study regional hydrometeorological changes using GPS and GRACE measurements
On the ability to study regional hydrometeorological changes using GPS and GRACE measurements Open
View article: A new Multivariate Drought Severity Index to identify short-term hydrological signals: case study of the Amazon River basin
A new Multivariate Drought Severity Index to identify short-term hydrological signals: case study of the Amazon River basin Open
View article: On the uncertainty of the uncertainty of long-term trends derived from geophysical and climate time series
On the uncertainty of the uncertainty of long-term trends derived from geophysical and climate time series Open
Quantifying the uncertainty associated with parameter estimates is crucial for a wide range of geophysical and climate applications. This is particularly important for interpreting the long-term trends of quantities of interest, such as gr…
View article: Differences in annual signals between IGS- and NGL-derived position time series: testing different strategies of alignment to the reference frame
Differences in annual signals between IGS- and NGL-derived position time series: testing different strategies of alignment to the reference frame Open
Annual signals derived from GNSS position time series have become a very important source of information on a variety of geophysical phenomena occurring in the closer or farther vicinity of the antennas. In this research, we investigated t…
View article: A novel multivariate drought severity index: study of short-term hydrological signals within Amazon river basin
A novel multivariate drought severity index: study of short-term hydrological signals within Amazon river basin Open
The pace of Earth’s climate warming obviously sped up, especially after 2000s. Droughts are increasingly becoming frequent, longer and more severe, with lasting impacts on ecosystems, communities and people. Thus, addressing th…
View article: The fractional Sinusoidal wavefront Model (fSwp) for time series displaying persistent stationary cycles
The fractional Sinusoidal wavefront Model (fSwp) for time series displaying persistent stationary cycles Open
In the analysis of sub-annual climatological or geodetic time series such as tide gauges, precipitable water vapor, or GNSS vertical displacements time series but also temperatures or gases concentrations, seasonal cycles are often found t…
View article: Modeling trends and periodic components in geodetic time series: a unified approach
Modeling trends and periodic components in geodetic time series: a unified approach Open
Geodetic time series are usually modeled with a deterministic approach that includes trend, annual, and semiannual periodic components having constant amplitude and phase-lag. Although simple, this approach neglects the time-variability or…
View article: Long-Term Temporal Scales of Hydrosphere Changes Observed by GPS Over Europe: A Comparison With GRACE and ENSO
Long-Term Temporal Scales of Hydrosphere Changes Observed by GPS Over Europe: A Comparison With GRACE and ENSO Open
Hydrogeodesy can benefit greatly from the use of Global Positioning System\n(GPS) displacements to analyse local changes in the hydrosphere, which the\ncommonly used Gravity Recovery and Climate Experiment (GRACE) mission is unable\nto pro…
View article: Introducing the Idea of Classifying Sets of Permanent GNSS Stations as Benchmarks for Hydrogeodesy
Introducing the Idea of Classifying Sets of Permanent GNSS Stations as Benchmarks for Hydrogeodesy Open
We propose a novel approach to classify sets of Global Navigation Satellite System (GNSS) permanent stations as benchmarks for hydrogeodesy. Benchmarks are trusted sets of GNSS stations whose displacements are classified as significantly a…
View article: The global land water storage data set release 2 (GLWS2.0) derived via assimilating GRACE and GRACE-FO data into a global hydrological model
The global land water storage data set release 2 (GLWS2.0) derived via assimilating GRACE and GRACE-FO data into a global hydrological model Open
We describe the new global land water storage data set GLWS2.0, which contains total water storage anomalies (TWSA) over the global land except for Greenland and Antarctica with a spatial resolution of 0.5 $$^\circ $$ , covering the tim…
View article: Studying spatio-temporal patterns of vertical displacements caused by groundwater mass changes observed with GPS
Studying spatio-temporal patterns of vertical displacements caused by groundwater mass changes observed with GPS Open
The sensitivity of Global Positioning System (GPS) technique to detect displacements caused by Total Water Storage (TWS) changes has already been analyzed, while its sensitivity to individual TWS components, such as groundwater, is still i…
View article: Assessing long-term ZTD trends for climate
Assessing long-term ZTD trends for climate Open
In this presentation we showcase results of an ongoing effort to assess long-term ZTD trends for eventual use in climate models, either for assimilation or validation. We have been analyzing the ZTD time series estimated from six REPRO3 IG…
View article: On the systematic differences between various GNSS solutions
On the systematic differences between various GNSS solutions Open
Space geodesy is the branch of science that deals with determining the shape and dimension of the Earth using quasars and artificial satellites. However, the use of space techniques is not limited to geodesy, many recent geodynamical inter…
View article: Quality assessment of the gridded climate indices estimated from GNSS displacements for the European area
Quality assessment of the gridded climate indices estimated from GNSS displacements for the European area Open
For more than 30 years, the Global Navigation Satellite System (GNSS) has successfully detected local crust deformations. These changes in deformation are caused, among other things, by changes in Total Water Storage (TWS), which reflect r…
View article: Hydrospheric mass loading for Europe from GNSS vertical displacement and a hydrological model
Hydrospheric mass loading for Europe from GNSS vertical displacement and a hydrological model Open
The interpretation of hydrospheric changes in the context of climate change can be enhanced using Global Navigation Satellite System (GNSS) displacement time series (DTS) combined with the one of a hydrological model. Our methodology is ba…
View article: Demystifying long-term changes observed by GNSS: comparison with GRACE observations and hydrological models
Demystifying long-term changes observed by GNSS: comparison with GRACE observations and hydrological models Open
Hydrogeodesy is an applied scientific field that uses precise geodetic observations to measure or infer hydrological quantities and their changes over time. Recently, modern geodesy supplies hydrology with a very powerful tools based on th…
View article: The global land water storage data set GLWS 2.0: assimilating GRACE and GRACE-FO into a global hydrological model
The global land water storage data set GLWS 2.0: assimilating GRACE and GRACE-FO into a global hydrological model Open
The satellite mission Gravity Recovery And Climate Experiment (GRACE) provided and its successor GRACE-FollowOn (GRACE-FO) provides a great opportunity to derive observations of the global water cycle from space. The missions have contribu…
View article: Merging the gravity fields of the GRACE Follow-On Science Data System project using different weighting approaches
Merging the gravity fields of the GRACE Follow-On Science Data System project using different weighting approaches Open
For over two decades, an essential information about global monthly gravity variations is provided by the GRACE mission and its successor, the GRACE Follow-On (GRACE-FO) mission. The temporal variations in gravity field from GRACE/GRACEFO …
View article: Research on general theory and methodology in geodesy in Poland in 2019–2022
Research on general theory and methodology in geodesy in Poland in 2019–2022 Open
We present a summary of research carried out in 2019–2022 in Poland in the area of general theory and methodology in geodesy. The study contains a description of original contributions by authors affiliated with Polish scientific instituti…
View article: Quality Control Methods for Climate Applications of Geodetic Tropospheric Parameters
Quality Control Methods for Climate Applications of Geodetic Tropospheric Parameters Open
We have been analyzing the zenith total delay (ZTD) time series provided by six REPRO3 International GNSS Service (IGS) Analysis Centers (ACs), namely, COD, ESA, GFZ, GRG, JPL, and TUG, to compare their long-term trends. Long-term here mea…
View article: The global land water storage data set release 2 (GLWS2.0) derived via assimilating GRACE and GRACE-FO data into a global hydrological model
The global land water storage data set release 2 (GLWS2.0) derived via assimilating GRACE and GRACE-FO data into a global hydrological model Open
We describe the new global land water storage data set GLWS2.0, which contains total water storage anomalies (TWSA) over the global land except for Greenland and Antarctica with a spatial resolution of 0.5°, covering the time frame 2003 to…
View article: Investigating temporal and spatial patterns in the stochastic component of ZTD time series over Europe
Investigating temporal and spatial patterns in the stochastic component of ZTD time series over Europe Open
The EUREF Permanent GNSS Network (EPN) provides a unique atmospheric dataset over Europe in the form of Zenith Total Delay (ZTD) time series. These ZTD time series are estimated independently by different analysis centers, but a combined s…
View article: The global land water storage data set release 2 (GLWS2.0) derived via assimilating GRACE and GRACE-FO data into the WaterGAP global hydrological model
The global land water storage data set release 2 (GLWS2.0) derived via assimilating GRACE and GRACE-FO data into the WaterGAP global hydrological model Open
<p>We describe the new Global Land Water Storage data set (GLWS2.0), which contains total water storage anomalies (TWSA) over the global land with a spatial resolution of 0.5°, covering the time frame 2003 to 2019 without ga…
View article: Merging GRACE Follow-On gravity fields with various approaches
Merging GRACE Follow-On gravity fields with various approaches Open
<p>For the 2002–2017 period, an essential information about global monthly gravity variations was provided by the Gravity Recovery and Climate Experiment (GRACE) mission. Gravimetric mission have given a new opportunities t…
View article: A report on JWG C.2: Quality control methods for climate applications of geodetic tropospheric parameters &#160;
A report on JWG C.2: Quality control methods for climate applications of geodetic tropospheric parameters   Open
<p>We have been analyzing the ZTD time series estimated from six REPRO3 IGS Analysis Centers (ACs), namely, COD, ESA, GFZ, GRG, JPL, TUG, to compare their long-term trends. Long-term here means 20 years or longer. About thirty statio…
View article: Quantifying the impact of environmental loading on Zenith Tropospheric Delays in Europe
Quantifying the impact of environmental loading on Zenith Tropospheric Delays in Europe Open
<p>We assess the impact of the environmental loading on the Zenith Total Delay (ZTD) time series estimated within the second re-processing campaign of the EUREF Permanent GNSS Network (EPN). In particular, we used one solution provid…