Satellite gravimetry-based analysis of terrestrial water storage and its relationship with run-off from the Lena River in eastern Siberia

Suzuki, Katsuhiko; Matsuo, Koji; Hiyama, Tetsuya

doi:10.1080/01431161.2016.1165890

Cited by 19 publications

(11 citation statements)

References 28 publications

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“…Thus, the long-term trends observed in the mean annual TWS GRACE were consistent with those observed in TWS GLDAS2. Overall, these TSW data showed a decrease throughout the ACTR between 2002 and 2016, thereby providing evidence that hydrological changes are not only limited in the downstream of the Lena River basin, as reported in [12] but also are expanding throughout the whole ACTR.…”

Section: Tws In the Arctic Circumpolar Tundrasupporting

confidence: 74%

“…In this section, we outline the theoretical basis of our analysis. To evaluate the monthly TWS from the GRACE data, we use the water balance equation expressed by Suzuki et al [12]:…”

Section: Theorymentioning

confidence: 99%

“…We also used the river runoff data to explore the relationship between TWS and river runoff. Based on previous work [12,37,38], we hypothesize that the conditions during autumn and winter will affect river runoff in the subsequent year. To test this hypothesis, we calculated the correlations between the TWS values from July of one year and those from June of the following year along with those for the annual river runoff using available data.…”

Section: Tws Changes Among the Three River Basinsmentioning

confidence: 99%

“…Therefore, an evaluation of the spatiotemporal variability in TWS in the Arctic is needed to better understand and quantify the hydrological changes that could occur in the next few decades. Suzuki et al [12] recently analyzed the spatiotemporal variability in the Arctic TWS further and showed that between August 2002 and August 2015, the coastal tundra in the Lena River basin dried due to increased evapotranspiration rates.…”

Section: Introductionmentioning

confidence: 99%

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Hydrological Variability and Changes in the Arctic Circumpolar Tundra and the Three Largest Pan-Arctic River Basins from 2002 to 2016

et al. 2018

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The Arctic freshwater budget is critical for understanding the climate in the northern regions. However, the hydrology of the Arctic circumpolar tundra region (ACTR) and the largest pan-Arctic rivers are still not well understood. In this paper, we analyze the spatiotemporal variations in the terrestrial water storage (TWS) of the ACTR and three of the largest pan-Arctic river basins (Lena, Mackenzie, Yukon). To do this, we utilize monthly Gravity Recovery and Climate Experiment (GRACE) data from 2002 to 2016. Together with global land reanalysis, and river runoff data, we identify declining TWS trends throughout the ACTR that we attribute largely to increasing evapotranspiration driven by increasing summer air temperatures. In terms of regional changes, large and significant negative trends in TWS are observed mainly over the North American continent. At basin scale, we show that, in the Lena River basin, the autumnal TWS signal persists until the spring of the following year, while in the Mackenzie River basin, the TWS level in the autumn and winter has no significant impact on the following year. As expected global warming is expected to be particularly significant in the northern regions, our results are important for understanding future TWS trends, with possible further decline.

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Section: Tws In the Arctic Circumpolar Tundrasupporting

confidence: 74%

“…In this section, we outline the theoretical basis of our analysis. To evaluate the monthly TWS from the GRACE data, we use the water balance equation expressed by Suzuki et al [12]:…”

Section: Theorymentioning

confidence: 99%

Section: Tws Changes Among the Three River Basinsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrological Variability and Changes in the Arctic Circumpolar Tundra and the Three Largest Pan-Arctic River Basins from 2002 to 2016

et al. 2018

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“…In the middle of the Lena river basin in eastern Siberia, the thawing depth (active layer depth) in late summer drastically deepened, and soil moisture increased from 2005 to 2008 (Ohta et al 2008, Iijima et al 2016. Velicogna et al (2012), Vey et al (2013) and Suzuki et al (2016) detected an increase in terrestrial water storage in the Lena river basin during the period from 2002 to 2008 using monthly solutions from the Gravity Recovery And Climate Experiment satellite mission. These were partly due to high rainfall in late summer and high snowfall in winter (Hiyama et al 2013a, Iijima et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Recent interdecadal changes in the interannual variability of precipitation and atmospheric circulation over northern Eurasia

Hiyama

Fujinami

Kanamori

et al. 2016

Environ. Res. Lett.

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This study investigated the interannual variability and trends in precipitation and atmospheric circulation patterns over northern Eurasia using long-term Precipitation REConstruction over Land and atmospheric Japanese 55-year Reanalysis data (JRA-55) from 1958 to 2012. Special emphasis was placed on the recent increase in summer (June, July and August) precipitation around the Lena river basin in eastern Siberia. We found interdecadal modulation in the relationships between interannual variability in summer precipitation and atmospheric circulation patterns among the three major Siberian river basins (Lena, Yenisei, and Ob). The interannual variations in summer precipitation over the Ob and Lena river basins were negatively correlated from the mid-1970s to the mid-1990s. However, after the mid-1990s, this negative correlation became insignificant. In contrast, a significant positive correlation was apparent between the Yenisei and Lena river basins. We also found that there has been a significant increasing (positive) trend in geopotential height in the low-level troposphere since the mid-1980s over Mongolia and European Russia, resulting in an increasing trend of westerly moisture flux into the Yenisei and Lena river basins. Summer precipitation in both basins was continuously high from 2005 to 2008 under a trough that broadly extended from the Yenisei and Lena river basins, which has been a typical pattern of interannual variation since the mid-1990s. This trough increased the meridional pressure gradient between Mongolia and eastern Siberia in combination with the trend pattern. This further enhanced the eastward moisture flux towards the Lena river basin and its convergence over the basin, resulting in high summer precipitation from 2005 to 2008.

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Accelerated continental‐scale snowmelt and ecohydrological impacts in the four largest Siberian river basins in response to spring warming

Suzuki

Hiyama

Matsuo

et al. 2020

Hydrological Processes

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River runoff from the four largest Siberian river basins (the Ob, Yenisei, Lena, and Kolyma) considerably contributes to freshwater flux into the Arctic Ocean from the Eurasian continent. However, the effects of variation in snow cover fraction on the ecohydrological variations in these basins are not well understood. In this study, we analysed the spatiotemporal variability of the maximum snow cover fraction (SCFmax) in the four Siberian river basins. We compared the SCFmax from 2000 to 2016 with data in terms of monthly temperature and precipitation, night‐time surface temperatures, the terrestrial water storage anomaly (TWSA), the normalised difference vegetation index (NDVI), and river runoff. Our results exhibit a decreasing trend in the April SCFmax values since 2000, largely in response to warming air temperatures in April. We identified snowmelt water as the dominant control on the observed increase in the runoff contribution in May across all four Siberian river basins. In addition, we detected that the interannual river runoff was predominantly controlled by interannual variations in the TWSA. The NDVI in June was strongly controlled by the timing of the snowmelt along with the surface air temperature and TWSA in June. The rate of increase in the freshwater flux from the four Siberian rivers decreased from 2000 to 2016, exhibiting large interannual variations corresponding to interannual variations in the TWSA. However, we identified a clear increase trend in the freshwater flux of ~4 km3/year when analysing the long‐term 39‐year historical record (1978–2016). Our results suggest that continued global warming will accelerate the transition towards the earlier timing of snowmelt and spring freshwater flux into the Arctic Ocean. Our findings also highlight the effects of earlier snowmelt on ecohydrological changes in the Northern Hemisphere.

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Satellite gravimetry-based analysis of terrestrial water storage and its relationship with run-off from the Lena River in eastern Siberia

Cited by 19 publications

References 28 publications

Hydrological Variability and Changes in the Arctic Circumpolar Tundra and the Three Largest Pan-Arctic River Basins from 2002 to 2016

Hydrological Variability and Changes in the Arctic Circumpolar Tundra and the Three Largest Pan-Arctic River Basins from 2002 to 2016

Recent interdecadal changes in the interannual variability of precipitation and atmospheric circulation over northern Eurasia

Accelerated continental‐scale snowmelt and ecohydrological impacts in the four largest Siberian river basins in response to spring warming

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