Bo Wang's research works | Shandong Academy of Sciences and other places

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Distributions of the evaporation duct property anomalies for eddy composites of 576 AEs and 637 CEs in the KE region between 2000 and 2019. (a–b) The top row shows AEs, while (c–d) the bottom row shows CEs. The evaporation duct property anomalies shown include (a), (c) EDHa and (b), (d) EDSa. SLAs are shown in contours (a–d), with a solid line denoting a positive value and a strikethrough line denoting a negative value. The units are as follows: m for EDHa and SLAs; M for EDSa. At the 99% confidence level based on the t test, all values containing dots are significantly different from zero.

Mean evaporation duct property anomalies (the top row shows EDHa, and the middle row shows EDSa) within the radius after compositing according to the eddy characteristic parameters of (a), (d) the eddy amplitude, (b), (e) eddy radius, and (c), (f) eddy lifespan, where the red dots and fitted curve indicate AEs and the blue dots indicate CEs. Relative importance (bottom row) of the different eddy characteristic parameters to evaporation duct property anomalies, where the red columns denote AEs and the blue columns denote CEs. The partial correlation analysis results by controlling for other eddy feature parameters are also shown in panels (a–f). Symbol * means that the result is significant at a 99% confidence level through t‐tests.

Meteorological parameter anomaly distributions of VMM‐mechanism‐dominated eddy composites from 576 AEs and 637 CEs in the KE region between 2000 and 2019. (a–c) The top row shows AEs, while (d–f) the bottom row shows CEs. The meteorological parameter anomalies shown include (a), (d) SSTa, (b), (e) RHa, and (c), (f) wind divergence, which are shown in color. (a), (d) ASTDa, (b), (e) SLPa and (c), (f) WSa are shown in contours, with a solid line denoting a positive value and a strikethrough line denoting a negative value. The units are as follows: °C for SSTa and ASTDa; % for RHa; Pa for SLPa; s⁻¹ for wind divergence; and m/s for WSa. At the 99% confidence level based on the t test, all values containing dots are significantly different from zero.

Anomalies of zonal wind shear (a), (b) and vertical velocity (c), (d), defined as positive downwards) between 600 hPa and 1,000 hPa along y = 0 in the normalized coordinate system. The bottom row shows the distribution of vertical velocity anomalies at 850 hPa (color) and boundary layer height (contour). The left column is for AE the right column is for CE (all the eddies occur in Winter: December to February). The units are as follows: m/s/hpa for wind shear anomalies; pa/s for vertical velocity anomalies; m for boundary layer height. At the 90% confidence level based on the t test, all values containing dots are significantly different from zero.

Evaporation Duct Anomalies Caused by Mesoscale Eddies in the Kuroshio Extension

June 2024

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1 Citation

Geophysical Research Letters

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Plain Language Summary Mesoscale eddies typically carry water with different characteristics from the surrounding environment, allowing them to transport moisture and energy at the ocean–atmosphere interface, thereby influencing the characteristic properties of evaporation ducts over the sea. To date, researchers have focused on the effects of various oceanic and atmospheric processes on evaporation ducts. However, there has been a persistent lack of research on the properties of evaporation ducts under the impact of mesoscale eddies. In this study, the variability in the evaporation duct environment under the influence of eddies and the underlying mechanisms are statistically analyzed. The results showed that ubiquitous mesoscale eddies could moderately modulate evaporation duct properties, which in turn could influence the effectiveness of shipborne radar technology, such as electromagnetic propagation, communication, and target detection.

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... Although anticyclonic and cyclonic eddies (AE/CE) coexist in the ocean in similar proportions and spatial distributions (Chelton, Gaube, et al., 2011), researchers often discuss their characteristics based on their polarities, such as AE/CE tend to deepen/shoal the thermocline in formation (McGillicuddy, 2016). Asymmetric polarities of eddies also lead to divergent impacts on sea surface temperature anomalies, mixed layer depth, evaporation duct anomalies, surface heat fluxes, and so on (Frenger et al., 2013;Gao et al., 2024;Gaube et al., 2019;Lv et al., 2022). For example, utilizing satellite altimetry data, Morrow et al. (2004) showed that AE and CE tend to propagate equatorward and poleward, respectively. ...
Reference:
Divergent Leakage Features of Anticyclonic and Cyclonic Mesoscale Eddies

Evaporation Duct Anomalies Caused by Mesoscale Eddies in the Kuroshio Extension

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June 2024

Geophysical Research Letters

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Bo Wang’s research while affiliated with Shandong Academy of Sciences and other places

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