Table 1 Times of SAR observations, flow regimes, characteristics and names of surface frontal feature of waves, and estimated times of wave generation.

From: Nonlinear internal wave spirals in the northern East China Sea

SAR image

Time (SAR image taken)

Flow regime and characteristics of internal wave features

Feature name

/Time of wave generation

#1

21:45:30

September 10, 2014

Wedge patterns consisting of long and short arc-like curvatures extending from the sill

‘B’/22:05 Sep 8, 2014

‘A’/23:55 Sep 8, 2014

‘D’/11:40 Sep 9, 2014

‘C’/11:50 Sep 9, 2014

‘F’/22:20 Sep 9, 2014

‘E’/00:15 Sep 10, 2014

‘H’/10:10 Sep 10, 2014

‘G’/12:40 Sep 10, 2014

#2

09:43:54 May 28, 2015

Propagation dominated,

waves generated from a remote area passing by the sill

No local generation

#3

21:38:07 June 3, 2015

Short arc-like curvatures starting from the sill

‘J’/19:55 Jun 3, 2015

#4

21:31:17 June 5, 2015

Short arc-like curvatures starting from the sill

‘K’/19:44 Jun 3, 2015

#5

21:45:31 June 12, 2015

Long and spiral patterns starting from the sill

‘L’/06:05 Jun 12, 2015,

‘M’/16:50 Jun 12, 2015